High Protein Breakfast Casserole Recipe

If you’re looking for a hearty, nourishing way to start your day, this High Protein Breakfast Casserole Recipe will quickly become your go-to. I absolutely love this casserole because it’s packed with protein, easy to prep ahead, and the flavors just meld together into something wonderfully comforting without any fuss. Whether you’re meal-prepping for the week or craving a crowd-pleasing brunch, this recipe has your back – and trust me, once you try it, you’ll see why it’s a staple in my kitchen.

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Ingredients You’ll Need

These ingredients combine for a balanced, high-protein meal that feels indulgent but is actually quite healthy. When I shop, I like to choose fresh veggies and quality turkey to get the best flavor and nutrition.

• Oil: I use olive or avocado oil for sautéing to add a mild, healthy fat without overpowering the flavors.
• Onion: Adds a subtle sweetness and depth; diced small so it cooks evenly and blends well in the casserole.
• Red bell pepper: Brings a pop of color and a slight crunch that brightens up each bite.
• Ground turkey or ground turkey sausage: A lean source of protein with mild flavor, great for layering in this breakfast dish.
• Sea salt: Enhances all the flavors; I split it between cooking and mixing to season everything perfectly.
• Eggs: The star protein that binds the casserole together and provides structure and creaminess.
• Cottage cheese: You might be surprised, but this adds moisture and a creamy texture while pumping up the protein content.
• Garlic powder: Adds a gentle, savory kick without overwhelming the eggs or veggies.
• Ground black pepper: A touch of spice that wakes up the dish and balances the richness.
• Fresh chives: For that fresh oniony brightness—plus, they make the casserole look as good as it tastes.
• Shredded cheddar cheese: Melts beautifully on top for golden, bubbly goodness with every bite.

Variations

I always encourage you to make this casserole your own. Over time, I’ve tweaked it here and there to accommodate cravings or what I have on hand, and it’s fun to experiment!

• Use sausage instead of turkey: When I want a little extra flavor punch, I swap in ground turkey sausage for a spicier kick.
• Add different veggies: Mushrooms, spinach, or zucchini all work wonderfully – just sauté them like the onions and peppers.
• Make it dairy-free: If you’re avoiding dairy, try swapping cottage cheese and cheddar for vegan alternatives or omit cheese entirely.
• Use egg whites only: For a leaner version, replace some whole eggs with egg whites – I’ve done this on lighter mornings and it’s still plenty satisfying.

How to Make High Protein Breakfast Casserole Recipe

Step 1: Prep and Sauté Your Veggies

Start by preheating your oven to 375°F and greasing your 9×13 casserole dish – trust me, this helps everything release easily after baking. Heat some oil in a skillet over medium heat, then toss in the diced onions and red bell peppers. Cook these until soft and fragrant, about 5 to 7 minutes. This step builds the foundation of flavor, so don’t rush it. Once softened, transfer them to a large mixing bowl so they can cool while you move on.

Step 2: Cook the Ground Turkey

In the same skillet, add a little more oil and the ground turkey. Sprinkle half a teaspoon of salt over it, which helps bring out the meat’s natural flavor. Stir and crumble the turkey as it cooks, letting it brown lightly—about 6 to 8 minutes. Browning adds a savory depth you don’t want to miss. When done, pour that into the bowl with your veggies and set aside to cool. Keeping things warm but not hot makes mixing easier later.

Step 3: Blend the Egg Mixture

Now the magic — in a blender or using an immersion blender, combine the remaining salt, eggs, cottage cheese, garlic powder, black pepper, and fresh chives. Blend until you get a smooth, silky batter. I like this method because it whips in air, making the casserole nice and fluffy. You could also whisk by hand, but blending gives a slightly lighter texture that really stands out.

Step 4: Combine and Bake

Pour the egg mixture into the bowl with the turkey and sautéed veggies. Mix everything gently but thoroughly so each bite gets a perfect balance. Spread this evenly into your prepared casserole dish, then sprinkle shredded cheddar cheese over the top. If you’re feeling fancy, add a few extra diced chives for a fresh pop of green. Cover with foil and bake for 20 minutes, then remove the foil and bake another 15 to 20 minutes until the eggs set and the top turns a gorgeous golden brown. Let the casserole rest for 10 minutes before slicing—it really helps it hold together.

How to Serve High Protein Breakfast Casserole Recipe

Garnishes

I always sprinkle a bit of fresh chopped chives or parsley on top just before serving—it brightens the flavors and adds a pretty splash of green. A dollop of sour cream or a spoonful of salsa also pairs beautifully, especially if you like a little extra tang or spice.

Side Dishes

This casserole shines on its own, but I like to serve it alongside fresh fruit like berries or orange slices to balance the savory richness. A simple green salad or roasted potatoes also work great if you’re having it for brunch or a heartier meal.

Creative Ways to Present

For holiday mornings or special gatherings, I’ve served this casserole in individual ramekins for neat personal portions. You can also cut it into squares and serve buffet-style—guests love grabbing a slice with a little fresh herb garnish and dipping sauces on the side.

Make Ahead and Storage

Storing Leftovers

I store leftover casserole tightly wrapped in the fridge for up to 4 days. It reheats well and actually tastes better after the flavors have had time to meld overnight.

Freezing

Whenever I make a big batch, I slice and freeze individual portions in airtight containers. When you’re ready to eat, thaw overnight in the fridge and reheat for an easy, protein-packed breakfast on busy mornings.

Reheating

To keep the casserole moist, I reheat it covered with foil in a 350°F oven until warmed through, about 15 minutes. You can also microwave slices, but covering with a damp paper towel helps avoid drying out.

FAQs

Final Thoughts

This High Protein Breakfast Casserole Recipe has been a total game-changer for me, especially on hectic mornings when I need something nourishing and ready to go. I love how it’s so versatile and forgiving, making it easy to tweak based on what I’m craving or have in the fridge. I really hope you give this recipe a try — it’s like a warm, satisfying hug in every bite, and I promise, it’ll earn a permanent spot in your breakfast rotation just like it did in mine.

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