This Make-Ahead Breakfast Casserole is a lifesaver for busy mornings. Packed with eggs, veggies, cheese, and savory sausage or turkey, it combines wholesome ingredients into a warm, satisfying dish that you can prepare in advance. Whether for a family breakfast, brunch gathering, or meal prep, this casserole offers a comforting start to your day with minimal morning effort.
Why You’ll Love This Recipe
Protein-Packed – Eggs and lean sausage provide lasting energy to power through your morning.
Veggie-Loaded – Bell peppers, spinach, or mushrooms add nutrition and fresh flavor.
Make-Ahead Friendly – Assemble the night before and bake when ready for hassle-free mornings.
Cheesy & Comforting – Melted cheese brings richness and satisfying texture.
Ingredients
- 8 large eggs
- 1 cup skim or low-fat milk
- 1 cup cooked lean sausage or turkey sausage, crumbled
- 1 cup shredded reduced-fat cheddar cheese
- 1 cup chopped bell peppers
- 1 cup fresh spinach, chopped
- ½ cup diced onion
- 1 tsp garlic powder
- ½ tsp salt
- ¼ tsp black pepper
Instructions
1. Prepare the Casserole
In a large bowl, whisk eggs and milk together until smooth. Stir in cooked sausage, cheese, bell peppers, spinach, onion, garlic powder, salt, and pepper.
2. Assemble & Refrigerate
Pour the mixture into a greased 9×13-inch baking dish. Cover tightly with foil and refrigerate overnight or up to 24 hours.
3. Bake the Casserole
Preheat oven to 350°F (175°C). Remove foil and bake uncovered for 35–40 minutes, or until the eggs are fully set and the top is lightly golden.
4. Serve Warm
Let cool for a few minutes before slicing. Serve as is or with a side of fresh fruit.

Nutritional Information (Per Serving)
Calories: 210
Protein: 18g
Fat: 12g
Carbohydrates: 6g
Sugar: 3g
Fiber: 1g
Tips for Success
- Use Fresh Ingredients – Fresh veggies and lean sausage keep the casserole flavorful and healthy.
- Customize Cheese – Swap cheddar for mozzarella, feta, or your favorite cheese.
- Add Herbs – Fresh parsley or chives add brightness and depth to the flavor.
Why This Recipe Works
The combination of protein-rich eggs and sausage with nutrient-packed vegetables makes this casserole both filling and balanced. Preparing it ahead saves time and stress, so you can enjoy a wholesome, homemade breakfast even on the busiest mornings.
This Make-Ahead Breakfast Casserole is a simple, delicious, and nourishing way to start your day. With hearty ingredients and easy prep, it’s perfect for feeding a crowd or enjoying leftovers throughout the week.
Make-Ahead Breakfast Casserole – Hearty, Convenient, and Full of Flavor
8
servings15
minutes40
minutes210
kcalA protein-packed breakfast casserole loaded with eggs, veggies, sausage, and cheese. Prepared the night before and baked fresh in the morning, it’s a convenient and satisfying start to any day.
Ingredients
8 large eggs
1 cup skim or low-fat milk
1 cup cooked lean sausage or turkey sausage, crumbled
1 cup shredded reduced-fat cheddar cheese
1 cup chopped bell peppers
1 cup fresh spinach, chopped
½ cup diced onion
1 tsp garlic powder
½ tsp salt
¼ tsp black pepper
Instructions
- Prepare the Casserole
In a large bowl, whisk eggs and milk together until smooth. Stir in cooked sausage, cheese, bell peppers, spinach, onion, garlic powder, salt, and pepper. - Assemble & Refrigerate
Pour the mixture into a greased 9×13-inch baking dish. Cover tightly with foil and refrigerate overnight or up to 24 hours. - Bake the Casserole
Preheat oven to 350°F (175°C). Remove foil and bake uncovered for 35–40 minutes, or until the eggs are fully set and the top is lightly golden. - Serve Warm
Let cool for a few minutes before slicing. Serve as is or with a side of fresh fruit.
Notes
- Use Fresh Ingredients – Fresh veggies and lean sausage keep the casserole flavorful and healthy.
Customize Cheese – Swap cheddar for mozzarella, feta, or your favorite cheese.
Add Herbs – Fresh parsley or chives add brightness and depth to the flavor.