Three Cheese Ground Sausage Breakfast Casserole
- Prep
- 15 min
- Cook
- 45 min
- Yield
- 10 servings
- Level
- medium
- Cuisine
- American
A protein-packed breakfast casserole combining savory ground sausage, fresh spinach, and three melted cheeses in a fluffy egg base. Perfect for weekend brunch, meal prep, or feeding a crowd without the carbs of traditional breakfast dishes. The combination of mozzarella, parmesan, and provolone creates rich, complex flavors while the sausage and garlic add hearty satisfaction. This make-ahead friendly dish reheats beautifully and keeps you full all morning.
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Method
9 steps- 1
Preheat oven and prepare baking dish with cooking spray
- 2
Cook ground sausage in skillet until fully cooked
- 3
Add garlic and onions to skillet and sauté with sausage for 2 minutes
- 4
Place sausage mixture in prepared baking dish
- 5
Add chopped spinach and 1/4 cup each of mozzarella, parmesan, and provolone
- 6
Whisk eggs with salt and pepper in separate bowl
- 7
Pour egg mixture into baking dish and gently mix to ensure eggs cover entire dish
- 8
Top with remaining mozzarella and provolone cheese
- 9
Bake for 45 minutes or until fork comes out clean and eggs are cooked through
Tips
Cook sausage completely before adding vegetables to prevent excess moisture in the final casserole.
Let the casserole rest for 5-10 minutes after baking to help it set properly before slicing.
Use fresh spinach rather than frozen to avoid watery texture - just chop it roughly before adding.
Good to Know
Refrigerate covered up to 4 days. Reheat individual portions in microwave or oven.
Assemble completely up to 24 hours ahead, cover and refrigerate, then bake as directed.
Cut into squares and serve hot. Pairs well with fresh fruit or avocado slices.
Common Mistakes
Cook sausage completely to avoid undercooked meat in final dish.
Don't skip the resting time to avoid runny texture when slicing.
Mix gently to avoid breaking up the layered ingredients too much.
Substitutions
lighter flavor
FAQ
Can I make this ahead of time?
Yes, assemble the entire casserole up to 24 hours ahead, cover and refrigerate, then bake as directed when ready to serve.
How long will leftovers keep?
Store covered in the refrigerator for up to 4 days. Reheat individual portions in the microwave or oven until heated through.
Can I freeze this casserole?
Yes, wrap tightly and freeze for up to 3 months. Thaw overnight in refrigerator before reheating in a 350°F oven.