Whole30 Breakfast Casserole with Sausage, Eggs, Spinach, and Mushrooms (Keto) (2024)

This Post May Contain Affiliate Links. Please Read OurDisclosure Policy.

This Whole30 breakfast casserole with sausage, eggs, spinach, and mushrooms is flavorful enough to live off of during a Whole30. You’ll love this healthy, paleo breakfast casserole because it’s packed with flavor, protein, and fiber, making you feel a-freaking-mazing all day.

Any time we’re on a Whole30, I spend a couple hours on Sunday afternoon,making dishes for the week. This usually looks like a batch of Whole30 garlic mayonnaise, Whole30 chicken salad, and Whole30 ranch dressing. But one Sunday, I was struck by the strangest, strongest urge to make a sausage and veggie bake, filled with chopped spinach, fresh tomatoes, sautéed mushrooms, homemade spicy breakfast sausage, and fresh herbs.

And you know what? I never tired of eating this Whole30 and paleo breakfast casserole that week, not once! No, I fell in love with the creamy egg bake, the rich sausage, the fresh veggies, the flavorful herbs. This is saying a lot, considering I need a savory breakfast to be absolutely top notch to maintain my attention.

Even better, I felt amazing after eating it, which is one of my very favorite things about eating a Whole30 breakfast. There’s no heaviness or energy slump. Nah, you feel light and energized and full until lunch. With loads of veggies and plenty of protein, this Whole30 breakfast casserole with sausage, eggs, spinach, and mushrooms might just be Whole30-perfect.

Why this Whole30 breakfast casserole is so good:

• It’s the Whole30 breakfast casserole for Whole30 breakfast casserole haters. It’s packed absolutely full of flavor and contains tons of protein.
• It isn’t heavy, and there’s great fiber content, too. This dish is one where I combined basically everything good I could think of and included all my favorite veggies: sausage, mushrooms, tomatoes. We had fresh basil on hand, soof course I added it. However, you’d be fine without it, or you could substitute dried basil easily.
• This Whole30 breakfast casserole comes together quite easily, making your Sunday meal prep easier than ever.

On top of being oh-so-flavorful, it’s super easy and pretty darn quick… major bonus points foranything Whole30, if you know what I mean. The directions go basically as follows: sauté stuff, pour eggs over, bake, um… eat? As much as Ifreaking love making mayonnaise all the time (liar, liar, pants on fire), I am all about some efficiencies in the kitchen.

Variations

• This Whole30 breakfast casserole is super versatile, so you can try it with different meats (Bacon is great!) or veggies. Sun-dried tomatoes would be awesome in this.
• Increase the eggs to 12 for an eggier paleo breakfast casserole that makes a bit more.
• Swap out roasted sweet potatoes for the mushrooms if you’re not a fan of fungi.
• Evenly distribute the veggie filling among the cups in a muffin tin and pour the eggs over for an on-the-go breakfast option.

Tips

• Don’t overbake this Whole30 breakfast casserole! Cook it until it’s just set and a knife inserted into the center comes out clean.
• Make sure you squeeze the water out of your thawed spinach, otherwise you’ll end up with a watery mess! If you do forget, just sauté the veggie mixture longer or until the water is evaporated.

Recipes You’ll Also Love

• Whole30 Hashbrown and Sausage Breakfast Casserole
• How to Make Soft Boiled Eggs
• Paleo Sweet Potato Apple Breakfast Bake
• Sweet Potato Whole30 Breakfast Bowl
• Whole30 Breakfast Sandwiches
• Easy Whole30 Breakfast Sausage
• Whole30 Quiche Lorraine with Hashbrown “Crust”