There’s something incredibly comforting about a hearty breakfast casserole, especially when it’s packed with protein. I remember the first time I made this dish for a family brunch. The mixture of savory chicken sausage, vibrant bell peppers, and melty cheeses filled the kitchen with mouthwatering aromas. Not only does this protein packed breakfast casserole keep everyone satisfied, but it also gives the day a delicious start. If you’re looking for a dish that’s easy to prepare, makes enough to feed a crowd, and can be made ahead of time, this is your answer.
What truly sets this casserole apart is its layered texture and robust flavors. Each bite bursts with freshness from the sautéed vegetables, the heartiness of the chicken sausage, and a delightful cheesiness that ties it all together. It’s a fantastic choice for brunch gatherings, family breakfasts, or anyone trying to infuse their morning with substantial nutrition. Let’s dive into why you’ll love this satisfying dish!
Why you’ll love this
- Quick to prepare: Whip it up in under 20 minutes.
- Great for meal prep: Make it ahead of time and just reheat.
- Filling and nutritious: Packed with protein and veggies to fuel your day.
- Versatile: Customize with your favorite ingredients or have fun with spices.
- Less clean-up: One dish means fewer dishes to wash after a hearty meal.
“A wonderful combination of flavors, and the leftovers are even better!”
Step-by-step overview
This dish comes together in a few simple steps. Begin by preheating your oven and sautéing the onion, garlic, mushrooms, and bell peppers in olive oil until tender. After combining the soused vegetables with chopped chicken sausage, whisk together egg whites, whole eggs, and milk in a separate bowl. Pour this mixture into your casserole dish, then add your spices and cheeses. Finally, after a short baking time covered with foil, top it with a crispy hashbrown layer and broil until golden and crunchy.
What you’ll need
- 3 cups bell peppers, chopped
- 1 cup mushrooms, sliced
- 1/2 cup onion, chopped
- 1 tbsp extra virgin olive oil
- 2 cloves garlic, chopped
- 4 links chicken sausage (or more depending on size of sausage)
- 1 cup egg whites
- 6 whole eggs
- 1/2 cup skim milk
- 1 tsp fennel seed
- 1/2 tsp paprika
- 1 tsp cumin
- 1/2 cup Monterey Jack cheese, shredded
- 1 cup cheddar cheese, shredded
- 4 cups hashbrowns, shredded and thawed (I used frozen and thawed them)
- 1 tbsp garlic powder
- Salt and pepper to taste
Ingredient notes & swaps
- Cheese Options: Feel free to use cheddar, gouda, or pepper jack for a spicy kick.
- Vegetable Swaps: Spinach, zucchini, or corn can be added for extra flavor.
- Sausage Alternatives: Turkey sausage or even plant-based sausage can work well for a lighter version.
How to make it
Making this protein packed breakfast casserole is straightforward, and you can adapt it to your taste. Here’s how to bring it to life:
- Preheat your oven to 375°F.
- In a skillet over medium heat, add olive oil. Sauté the onion and garlic until softened, which should take about 2-3 minutes.
- Add the sliced mushrooms and chopped bell peppers to the skillet. Cook until the vegetables are tender, about 5-7 minutes.
- While the vegetables are cooking, chop the chicken sausage into bite-sized pieces. Set aside.
- Combine the sautéed vegetables, chicken sausage, and half of the shredded cheddar cheese into a greased casserole dish.
- In a separate bowl, whisk together egg whites, whole eggs, and skim milk until smooth.
- Gently pour the egg mixture into the casserole dish over the sausage and vegetables.
- Sprinkle with fennel seed, paprika, cumin, and the remaining cheddar cheese. Cover the dish with foil and bake for 35 minutes.
- While the casserole bakes, mix the thawed hashbrowns with garlic powder and the remaining cheddar cheese in a bowl.
- Once the casserole is cooked, remove the foil and top with the hashbrown mixture.
- Set the broiler to low and broil for about 5 minutes, or until the hashbrowns are crispy and golden brown on top.
Helpful cooking tips
- Use frozen hashbrowns: They save time and can just be rinsed to thaw. This also brings in that great crispy layer.
- Don’t skip the foiling: Covering allows the eggs to firm up without overcooking.
- Let it cool slightly: Before serving, allow the casserole to set for a few minutes to make slicing easier.
Best ways to enjoy it
Serve this protein packed breakfast casserole warm, garnishing with fresh herbs like parsley or chives for a pop of color. It pairs well with fresh fruit, a light salad, or your favorite hot sauce for some added heat. Slices are also great for meal prep and can be wrapped in foil for a quick breakfast on the go throughout the week.
Storage & reheating tips
To store leftovers, simply place them in an airtight container in the refrigerator. This casserole can be kept for about 3 to 4 days before it’s likely to lose its quality. You can also freeze individual portions for up to a month. When reheating, ensure it is heated thoroughly until steaming hot throughout.
Refrigerate leftovers within 2 hours; reheat until steaming hot.
How to fix common issues
- If your casserole turns out too dry, try adding a little more liquid the next time (a splash of milk or cream).
- For a bland casserole, increase the spices, particularly cumin and paprika, to boost flavor in your next batch.
- If the bottom becomes soggy, make sure your hashbrowns are well-thawed and excess moisture is removed before layering.
Creative twists
This recipe is incredibly adaptable! You can try using spinach instead of bell peppers for a different veggie profile, or mix in diced tomatoes for a touch of acidity. Feel free to add more shredded cheese on top or swap out the Monterey Jack for gouda or pepper jack for a spicy twist. Explore components you enjoy to make this casserole uniquely yours.
Common questions
Can I make this casserole in advance?
Absolutely! You can prepare it the night before and store it in the refrigerator before baking it in the morning. Just add a few extra minutes to the baking time if it’s been in the fridge.
Is there a vegetarian version of this casserole?
Yes! You can leave out the chicken sausage and add more vegetables like spinach, zucchini, or even beans for protein. Just replace the sausage with your favorite meat alternative.
Can I use whole eggs instead of egg whites?
Definitely! You may substitute with all whole eggs if preferred. The dish will still turn out delicious; just keep in mind it may have a slightly richer flavor.
What can be served with this casserole?
This breakfast casserole pairs wonderfully with sides like fresh fruit, yogurt, or even a simple green salad to balance the richness.
Can I freeze the leftovers?
Yes! This protein packed breakfast casserole freezes beautifully. Just slice into portions and wrap tightly before placing them in the freezer. Thaw in the refrigerator overnight before reheating.
Enjoy this protein packed breakfast casserole for a nourishing and satisfying meal that can set the tone for your entire day!
Protein Packed Breakfast Casserole
Ingredients
Method
- Preheat your oven to 375°F (190°C).
- In a skillet over medium heat, add olive oil. Sauté the onion and garlic until softened, about 2-3 minutes.
- Add the sliced mushrooms and chopped bell peppers to the skillet. Cook until the vegetables are tender, about 5-7 minutes.
- Chop the chicken sausage into bite-sized pieces and set aside.
- Combine the sautéed vegetables, chicken sausage, and half of the shredded cheddar cheese in a greased casserole dish.
- In a separate bowl, whisk together egg whites, whole eggs, and skim milk until smooth.
- Gently pour the egg mixture into the casserole dish over the sausage and vegetables.
- Sprinkle with fennel seed, paprika, cumin, and the remaining cheddar cheese.
- Cover the dish with foil and bake for 35 minutes.
- While baking, mix the thawed hashbrowns with garlic powder and the remaining cheddar cheese in a bowl.
- Once the casserole is cooked, remove the foil and top with the hashbrown mixture.
- Set the broiler to low and broil for about 5 minutes, until the hashbrowns are crispy and golden brown.