High Protein Egg Casserole

The smell of toasted paprika and browning turkey sausage on a Sunday morning is enough to drag anyone out of bed, and that is exactly how this casserole earned a permanent spot in my weekend rotation. My roommate walked into the kitchen barefoot, still half asleep, pointed at the oven, and mumbled something about marrying whoever invented breakfast bakes. I pulled it out golden and puffed, and we ate straight from the dish with two forks standing at the counter.

I started making this during a phase where I was tired of sweet breakfasts and wanted something savory that could survive a busy work week in the fridge. The first attempt was underseasoned and sad, but once I dialed in the smoked paprika and let the vegetables properly soften, everything clicked into place.

Ingredients

• 10 large eggs: The backbone of the casserole, use room temperature eggs for the most even bake.
• 200 g lean turkey sausage: Precook and crumble it finely so every bite gets a little savory hit without greasy pooling.
• 120 g low fat cottage cheese: This is the secret weapon, it melts into the egg mixture and adds moisture and protein without heaviness.
• 100 g shredded reduced fat cheddar cheese: Reserve half for the top so you get that irresistible golden cheese crust.
• 1 red bell pepper diced: Adds sweetness and color, dice it small so it cooks through evenly.
• 1 small onion diced: Yellow or white both work, cook it with the sausage if you prefer a milder onion flavor.
• 80 g baby spinach roughly chopped: It wilts down dramatically so do not be alarmed by the initial volume.
• 1 tsp garlic powder: Distributes garlic flavor more evenly than fresh cloves in a baked dish like this.
• 1/2 tsp smoked paprika: This is what makes the kitchen smell incredible while it bakes, do not skip it.
• 1 tsp salt and 1/2 tsp black pepper: Season boldly because eggs need more salt than you think.

Instructions

Preheat and prep the dish:

Set your oven to 180 degrees Celsius (350 degrees Fahrenheit) and grease a 22 by 33 cm casserole dish with a light coating of oil or cooking spray so nothing sticks.

Whisk the egg base:

Crack all ten eggs into a large bowl, add the cottage cheese, garlic powder, smoked paprika, salt, and pepper, then whisk until the mixture looks smooth and the cottage cheese is mostly blended in.

Fold in the fillings:

Gently stir in the cooked crumbled turkey sausage, diced bell pepper, onion, chopped spinach, and half the cheddar cheese until everything is evenly distributed throughout the egg mixture.

Assemble and top with cheese:

Pour the whole mixture into your prepared baking dish and spread it out flat, then sprinkle the remaining cheddar evenly across the top so every slice gets a cheesy crown.

Bake until golden and set:

Slide it into the oven uncovered and bake for 30 to 35 minutes until the center no longer jiggles when you gently shake the dish and the top has turned a lovely golden color.

Rest and serve:

Let the casserole sit for five minutes before slicing so it firms up and holds its shape when you cut neat squares to serve warm.

Save

The morning I brought a pan of this to a friend who had just come home from the hospital, she sat on her kitchen floor eating it cold because she could not wait for the microwave, and that reaction told me this recipe was a keeper.

Making It Your Own

Swap the turkey sausage for lean chicken sausage, crumbled tempeh, or even leftover roasted vegetables depending on what your week looks like and what is sitting in the fridge. Mushrooms, zucchini, or diced tomatoes all work beautifully as long as you drain or precook anything that releases a lot of water.

Storing and Reheating

This casserole is a meal prep dream because it holds its texture for up to four days in the refrigerator when stored in an airtight container. Reheat individual slices in the microwave for about sixty seconds or in a low oven until warmed through, and it tastes nearly as good as the morning it was baked.

Serving Suggestions and Final Thoughts

A dollop of salsa or a few dashes of hot sauce on top elevates each slice with brightness and acidity that cuts through the richness of the cheese and eggs. A simple side salad or some sliced avocado turns a humble breakfast bake into something worth serving to weekend guests without any extra effort.

• Let the casserole cool completely before covering and refrigerating to avoid condensation making the top soggy.
• Freeze individual portions wrapped tightly in foil for up to one month for grab and go breakfasts.
• Always double check sausage ingredient labels if cooking for anyone with allergens or dietary restrictions.

Save

Keep this recipe in your back pocket for brunches, busy weeks, or whenever you need something nourishing that practically makes itself.

Common Recipe Questions

→ Can I use different sausages or proteins?

Yes. Lean chicken sausage, cooked bacon, or a plant-based sausage substitute all work well; adjust seasoning and pre-cook any raw proteins until browned before adding.

→ How can I keep the casserole from becoming watery?

Drain excess moisture from vegetables (especially mushrooms or zucchini) and use well-drained cottage cheese. Don’t overmix; bake until the center is set to avoid excess liquid.

→ What’s the best way to reheat leftovers?

Warm individual slices in a 175°C (350°F) oven for 8–10 minutes or microwave covered in short intervals until heated through to preserve texture.

→ Can I make this ahead and freeze it?

Yes. Assemble and either bake then freeze slices, or freeze the unbaked assembled dish (tightly wrapped). Thaw overnight in the fridge before baking and add a few extra minutes to the baking time if needed.

→ How do I know when it’s fully cooked?

The casserole is done when the center is set, edges pull slightly from the pan, and the top is lightly golden. A knife inserted near the center should come out clean or with a few moist crumbs.

→ Any tips to boost flavor without adding many calories?

Use smoked paprika and garlic powder as indicated, add fresh herbs like chives or parsley, and opt for reduced-fat cheddar to keep flavor while managing calories.