High Protein Breakfast Casserole Recipe

If you’re like me and always looking for a breakfast that’s not only filling but packs a serious protein punch, you’re going to absolutely love this High Protein Breakfast Casserole Recipe. It’s one of those dishes that feels like a warm morning hug—comforting, hearty, and downright delicious. Plus, it’s perfect for feeding a crowd or meal prepping for busy days. I can’t wait to share all the tips and tricks to help you nail it every time!

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Ingredients You’ll Need

All of these ingredients work beautifully together to create a creamy yet fluffy texture with savory flavor. I always recommend using fresh vegetables and good-quality turkey to keep things tasting bright and clean.

• Oil: Use a neutral oil like avocado or olive oil for sautéing.
• Small onion: Adds sweetness and depth; I like to dice it finely so it blends well.
• Red bell pepper: Brings a subtle crunch and gentle sweetness; diced small works best.
• Ground turkey or turkey sausage: Lean protein base; I prefer ground turkey sausage for extra seasoning.
• Sea salt: Use sparingly to bring out flavors without overpowering.
• Eggs: The binder that holds everything together—fresh eggs make a difference.
• Cottage cheese: Key for adding moisture and protein without heaviness.
• Garlic powder: A little punch of flavor that wakes up the dish.
• Ground black pepper: For subtle heat and complexity.
• Fresh chives: Adds a mild oniony freshness; reserve some to sprinkle on top.
• Shredded cheddar cheese: Melts to a golden, bubbly topping that everyone loves.

Variations

One of the best things about this High Protein Breakfast Casserole Recipe is how easy it is to make it your own. I’m always tweaking it depending on what’s in season or what’s in my fridge. Feel free to experiment with different veggies and proteins to suit your taste and dietary needs.

• Vegetarian Version: I once swapped out the turkey for crumbled tofu and added mushrooms—still so satisfying and protein-rich.
• Spicy Twist: Add diced jalapeños or a dash of cayenne powder to the egg mixture for a little morning kick.
• Cheese Swap: Try pepper jack or mozzarella for a different melty finish that changes the flavor profile.
• Seasonal Veggies: In the summer, I toss in zucchini or cherry tomatoes for freshness and texture.

How to Make High Protein Breakfast Casserole Recipe

Step 1: Prep Your Ingredients and Oven

Start by preheating your oven to 375°F and greasing a 9×13 baking dish with oil. This step is important so the casserole doesn’t stick and comes out cleanly. While the oven warms, dice your onion and red bell pepper. I find that prepping everything first makes the process so much smoother when cooking.

Step 2: Sauté Onions and Peppers

Heat a bit of oil in a large skillet over medium heat, then add the diced onions and bell peppers. Stir occasionally and cook until they’re soft and fragrant—about 5-7 minutes. These softened veggies add a naturally sweet flavor to the casserole that balances the savory turkey.

Step 3: Cook the Turkey

Give the skillet a quick wipe if needed, then add a little more oil and your ground turkey or turkey sausage. Sprinkle in half the sea salt now, and break the meat apart with a spatula. Cook until lightly browned and cooked through, around 6-8 minutes. This step builds the hearty protein base for the casserole.

Step 4: Blend the Egg Mixture

Now, this is my favorite part: combining the eggs, cottage cheese, remaining salt, garlic powder, pepper, and fresh chives in a blender until smooth. If you don’t have a blender handy, an immersion blender or even a whisk works, just make sure it’s well combined. The cottage cheese is what gives this casserole its creamy texture without being too heavy.

Step 5: Mix Everything Together

Combine the sautéed veggies, browned turkey, and your egg mixture in a large bowl. Stir everything until evenly mixed—this is when your casserole starts to come together. Trust me, the more evenly mixed, the better the texture after baking.

Step 6: Bake and Enjoy

Pour the mixture into the prepared baking dish, spread it out evenly, then sprinkle shredded cheddar cheese on top. Add some extra diced chives for color if you’re feeling fancy. Cover with foil and bake for 20 minutes, then remove the foil and bake for another 15-20 minutes until golden on top and the eggs are fully set. Let it rest for 10 minutes before slicing. This resting step helps everything firm up and makes serving a breeze.

How to Serve High Protein Breakfast Casserole Recipe

Garnishes

I love sprinkling fresh chives on top just before serving—it adds a pop of color and fresh flavor that makes the casserole look as good as it tastes. A little dollop of sour cream or a splash of hot sauce also works wonders if you like a flavor boost.

Side Dishes

Pair this casserole with a simple green salad for a light contrast or some fresh fruit to balance the savory richness. My family enjoys sliced avocado or even crispy breakfast potatoes on the side for a complete, satisfying meal.

Creative Ways to Present

For special brunches, I like to bake this in individual ramekins for a personalized touch—it looks fancy but requires minimal extra effort. You can also add a colorful spread of microgreens or a drizzle of herb-infused olive oil on top for an elegant finish.

Make Ahead and Storage

Storing Leftovers

Once cooled, I cover and store leftover casserole in the fridge for up to 4 days. It holds its texture really well, and I love having ready-to-go breakfasts or quick lunches whenever I’m short on time.

Freezing

I’ve frozen this casserole several times by slicing it into portions first, then wrapping each piece tightly with plastic wrap and placing in freezer bags. It freezes wonderfully and thaws quickly in the fridge.

Reheating

To reheat, I pop a slice in the microwave for 60–90 seconds or warm it in a toaster oven to keep the edges crisp. Avoid overheating to prevent dryness—just warm until heated through and enjoy.

FAQs

Final Thoughts

I honestly can’t get enough of this High Protein Breakfast Casserole Recipe. It’s one of those recipes that’s just as great on a simple weekday morning as it is for weekend brunch with friends. It’s hearty, nourishing, and so easy to make ahead. I’m confident once you try it, you’ll find yourself making it again and again. Give it a go—you might just discover your new favorite way to start the day!

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