Savory 24-Egg Keto Breakfast Casserole with Spinach & Feta

If you are anything like me, sometimes you just crave something savory and hearty when the alarm clock goes off. Pancakes are lovely, sure, but on those hectic weekday mornings, you need a hero waiting in the fridge. That’s why I developed this incredible Keto Breakfast Casserole with Spinach & Feta. It’s the ultimate make-ahead, protein-packed meal that fits perfectly into any low-carb lifestyle.

Breakfast casseroles hold such a special place in my heart. They remind me of those slow Sunday mornings around the table, but I’ve adapted this version for the fast pace of the week. When I was creating this, I wanted something that tasted fresh and bright—that Mediterranean blend of salty feta and earthy spinach just sings! Trust me, Lilya Lawson here, you are going to want to bake this on Sunday so you can grab a slice straight from the oven all week long.

A square slice of Keto Breakfast Casserole with Spinach & Feta served on a white plate, with the baking dish visible behind it.

Why This Keto Breakfast Casserole with Spinach & Feta is Your New Go-To

When I set out to make this dish, I wasn’t just looking for another recipe; I needed a reliable weekday solution. This Keto Breakfast Casserole with Spinach & Feta delivers every single time! It’s high in protein to keep you full until lunch, and it completely eliminates those morning scrambles trying to figure out what to eat.

  • It’s the perfect foundation for a keto friendly breakfast that doesn’t skimp on flavor.
  • The whole dish holds together beautifully, meaning zero wasted time cleaning up tiny pans later!
  • It’s packed with fresh veggies, so you feel great about eating it.

Perfect for Meal Prep and Quick Mornings

Honestly, this is what makes it a winner for me. You bake it once, and bam—you have breakfast for days. Whether you are heading out the door for work or just need quick keto snacks easy to grab for an afternoon pick-me-up, this casserole is ready to go. Just slice a square, heat it up, and you’re set!

Gathering Ingredients for Your Keto Breakfast Casserole with Spinach & Feta

When you’re making a savory dish like this, the quality of what goes in really shines through—that’s my rule for all easy recipes for kids or grown-up meals! We’re keeping this Keto Breakfast Casserole with Spinach & Feta straightforward, focusing on fresh ingredients that bring flavor without the carbs. You’ll need the staples: those 24 gorgeous eggs and hearty cream, but make sure you have your feta crumbled and those plum tomatoes seeded before you start whisking. These little prep steps save you from kitchen chaos later on!

Ingredient Notes and Substitutions for Keto Breakfast Casserole with Spinach & Feta

I get asked all the time about swapping things out, and for this classic, I’m happy to guide you. If you don’t like feta—though I highly recommend it for that salty Mediterranean zing!—you can substitute it with creamy goat cheese or even some firm halloumi if you happen to have some on hand. For the greens, if you’re fresh out of spinach, sturdy kale works beautifully, you just might need to wilt it down in the skillet for a minute or two longer than the spinach.

Now, about that liquid. I use a mix of 2% milk and heavy cream because the cream adds just the perfect amount of satisfying fat without making the casserole too heavy, which is a great balance for those eating Keto Breakfast Easy. If you want to push the fat content even higher for a serious carb free breakfast, feel free to use only heavy cream, but maybe dial back the salt just a touch!

Essential Equipment for Baking Your Keto Breakfast Casserole with Spinach & Feta

You don’t need a fancy kitchen for this Healthy Low Carb Breakfast, but you do need a couple of reliable workhorses. The two must-haves here are simple: a large skillet for waking up those shallots and wilting the spinach, and of course, the baking dish itself.

I always insist on using a 9 x 13 x 3-inch Pyrex deep baking dish for this. If you can swing it, use a glass dish instead of metal! My grandmother always baked in glass, and she was right—it distributes the heat so gently and evenly. When you’re baking something this big, you want that slow, steady bake so the middle sets up perfectly without the edges burning. That’s crucial for a satisfying low carb breakfast casserole!

A square slice of Keto Breakfast Casserole with Spinach & Feta, featuring a golden-brown top and visible feta cheese chunks.

You’ll also need a large bowl for mixing up that glorious egg base and a whisk. Make sure your skillet is big enough to handle all those greens; spinach shrinks down to nothing, but when you start, it looks like you’re cooking for an army!

Step-by-Step Instructions for the Keto Breakfast Casserole with Spinach & Feta

Alright, let’s get cooking! This is where that smell starts filling your house—the best part of making any carbless breakfast, if you ask me. We are aiming for a beautiful, sturdy center on this Keto Breakfast Casserole with Spinach & Feta, so stick close to the timing. Every step just builds on the last to give you that perfect texture.

Preparing the Vegetable Base

First things first: get that oven warmed up to 350F and take a moment to generously spray down that 9×13 glass dish. Now, move to the stove. Heat your olive oil in a large skillet over medium heat. Toss in those chopped shallots and let them get soft and sweet—that takes a good 6 to 8 minutes. Don’t rush this part; softened shallots create the flavor base!

Once they smell amazing, throw in that big bag of baby spinach. Cook it down until it absolutely wilts. When it’s all reduced down to almost nothing, you need to take that skillet completely off the heat. This is vital! If it’s too hot when you add the eggs later, you’ll end up with little bits of scrambled egg floating around. We want a smooth bake, remember?

Assembling and Baking Your Keto Friendly Breakfast

While your veggies are cooling down just a touch, grab a big bowl for the creamy goodness. Whisk those 24 eggs until they’re frothy, then add your milk, heavy cream, the crumbled Feta, those chopped scallions, diced tomatoes, salt, and pepper. Whisk everything together until it’s happy and combined.

Now, gently fold your wilted spinach and shallot mixture right into that egg base. Give it one final, careful stir to distribute everything evenly. Pour the whole beautiful mess into your prepared baking dish. Then, slide it into the oven. It needs a good long bake—about 1 hour and 20 minutes. You’ll know it’s done when the center is totally solid and cooked through. Give it a little jiggle, and if it doesn’t wobble too much, you nailed it!

A square slice of Keto Breakfast Casserole with Spinach & Feta on a white plate, showing baked eggs, green spinach, and white feta cheese.

Tips for Success with Your Healthy Low Carb Breakfast

Even though this Keto Breakfast Casserole with Spinach & Feta is straightforward, a couple of little tricks can take it from good to absolutely legendary, especially since this is a dish you might make often as part of your healthy low carb breakfast rotation.

Here are a few things I always do:

  • Always, always, always make sure your spinach and tomatoes are as dry as you can get them before they hit the egg mixture. I learned this the hard way once! If you’re rushing, use a paper towel to pat down the cooked spinach after you take it out of the skillet. Too much water means a soupy bottom layer on your Low Carb Breakfast Casserole, and we definitely don’t want that sad texture.
  • When you incorporate that salty Feta, don’t just dump it in. Gently crumble it first—I like to use my fingers to break it up into varying sizes. This way, you get creamy pockets of sharp flavor scattered throughout rather than one big block of cheese in the corner.
  • Patience after it comes out of the oven is tough, but necessary! Let the casserole rest for at least 15 minutes before you try slicing into it. This allows the proteins in the egg to fully set up, which helps keep your slices clean and neat. It’s the secret to getting those perfect squares for your other keto breakfast ideas easy.

Follow those little steps, and you’ll see why this is such a reliable dish for anyone seeking a satisfying carb free breakfast!

Serving Suggestions for Keto Breakfast Casserole with Spinach & Feta

The best part about a sturdy, savory bake like this Keto Breakfast Casserole with Spinach & Feta is how beautifully it plays with simple sides. Since this already hits all the comfort notes for a keto breakfast easy meal, you don’t need a lot of fuss. I usually serve mine with a big pile of fresh avocado slices seasoned with just a tiny pinch of sea salt.

If I’m serving this up for a big weekend brunch, sugar-free bacon or sausage links are a must—nobody misses the carbs when the meat is this flavorful! For a lighter touch, even a small side salad with a homemade vinaigrette works wonders. It just lifts the whole meal, making it feel fresh and satisfying.

Storage and Reheating Instructions for Keto Breakfast Casserole with Spinach & Feta

This Keto Breakfast Casserole with Spinach & Feta is truly a meal-prep champion! It’s so wonderful to know you have a satisfying, healthy low carb breakfast waiting for you. Once the casserole has cooled down completely—and I mean completely, or you’ll get condensation—cover the dish tightly with plastic wrap, or better yet, cut the servings into individual portions and put them in airtight containers.

It holds up brilliantly in the refrigerator for about four days. When it’s time to eat, I prefer the oven method for the best texture; just reheat individual slices at 325F for about 10-15 minutes until heated through. If you are completely rushed, the microwave works in about 45 seconds, but I find the edges get a little less tender that way. Either way, you’ve got a quick carb free breakfast ready to go!

A thick slice of Keto Breakfast Casserole with Spinach & Feta served on a white plate, with the baking dish in the background.

Frequently Asked Questions About Carb Free Breakfast Casseroles

It’s natural to have questions when you’re trying out a new and delicious keto healthy recipes staple. This Keto Breakfast Casserole with Spinach & Feta is so easy once you know the little tricks! Here are some of the common things folks ask me when they are planning out their low carb snacks for the week.

Can I make this Keto Breakfast Easy recipe ahead of time?

Absolutely! That’s one of the main reasons I love this dish so much. I usually bake mine on a Sunday evening, let it cool, cover it, and keep it in the fridge. It stays perfectly fresh and delicious for up to four full days. That means four days of super simple, protein-packed breakfasts waiting for you!

What is the best way to ensure my Low Carb Breakfast Casserole is not watery?

This is a great question, especially since we are using high-moisture vegetables! My biggest tip, which I touched on earlier but want to stress here, is drying your ingredients. After you wilt the spinach and dice those tomatoes, place them on several layers of paper towels or a clean kitchen towel and gently press all the excess liquid out. We want that moisture in the flavor profile, not pooled at the bottom of our casserole!

Can I add meat to this Low Carb Breakfast Casserole?

Yes, you totally can! This is wonderfully adaptable. If you want a bulkier meal, browned, crumbled sausage (be sure it’s sugar-free seasoning!) or cooked, chopped ham works beautifully. Just make sure you fully cook the meat first, drain off any grease, and then mix it in with the spinach and shallots mixture before pouring everything into the egg base. It makes for an even more filling keto friendly breakfast!

Is this recipe truly dairy-free if I need a different option?

It’s tough to make this specific recipe dairy-free because the Feta is such a star player in the flavor, and the cream adds so much needed fat for keto. If you need to avoid dairy, I’d suggest swapping the Feta for crumbled, firm tofu that you’ve seasoned heavily with nutritional yeast and salt to mimic that salty flavor. Swap the milk and heavy cream for full-fat canned coconut milk as your liquid base. It won’t taste the same, but it will bake up beautifully for a carbless breakfast!

Sharing Your Keto Healthy Recipes Experience

Now you have my foolproof way to get a hearty, savory Keto Breakfast Casserole with Spinach & Feta on your table! I’ve poured my heart into making this recipe reliable, whether you’re just starting out on keto or counting down the minutes until brunch.

But here’s the thing about cooking—it’s a conversation, right? I absolutely love hearing how this dish turns out in your kitchens. Did you try adding sun-dried tomatoes instead of fresh? How did you like those salty little pockets of feta?

Please, please leave a rating below! Tell me what you thought of this addition to your collection of keto healthy recipes. Five stars? Four? Be honest! And if you came up with a brilliant variation that made this Keto Breakfast Casserole with Spinach & Feta even better, share that idea in the comments too—we home cooks learn so much from each other.

I’m Lilya Lawson, and I hope this casserole brings a little bit of soulful comfort to your busy mornings, just as it does mine. If you have any questions about the recipe or just want to connect, feel free to reach out on my contact page!

A close-up, appetizing slice of Keto Breakfast Casserole with Spinach & Feta on a white plate.

Keto Breakfast Casserole with Spinach & Feta

This recipe offers a savory, make-ahead breakfast perfect for keto and low-carb eaters. It combines eggs, feta cheese, spinach, and fresh vegetables into a comforting, protein-rich baked meal that works well for busy weeks.
Prep Time 20 minutes
Cook Time 1 hour 20 minutes
Total Time 1 hour 40 minutes
Servings: 12 people
Course: Breakfast
Cuisine: Mediterranean

Ingredients
  

For the Casserole Base
  • 1 teaspoon olive oil
  • 3 shallots, chopped
  • 6 ounce bag baby spinach
  • 24 large eggs, beaten
  • 2 cups 2% milk
  • 1/2 cup heavy cream
  • 12 ounces Feta cheese, crumbled
  • 3 scallions, chopped
  • 3 plum tomatoes, seeded and diced
  • 2 1/2 teaspoons kosher salt
  • 1 black pepper to taste
  • olive oil spray for the dish

Equipment

  • 9 x 13 x 3-inch Pyrex Deep baking dish
  • Large skillet

Method
 

  1. Preheat your oven to 350F. Spray a 9 x 13 x 3-inch Pyrex Deep baking dish with oil.
  2. Heat a large skillet over medium heat. Add the oil and shallots and cook until soft, about 6 to 8 minutes.
  3. Add the spinach and cook until it wilts. Remove the skillet from the heat.
  4. In a large bowl, whisk together the eggs, milk, heavy cream, Feta, scallions, tomatoes, salt, and black pepper.
  5. Mix in the cooked spinach and shallots. Pour the mixture into the prepared baking dish.
  6. Bake until the center is solid and cooked through, which takes about 1 hour and 20 minutes.

Notes

This casserole is excellent for meal preparation. You can bake it ahead of time and store it in the refrigerator. Reheat individual portions in the microwave or oven when you are ready to eat.

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