Description

This Hearty Sausage Spinach Mushroom Egg Bake is a delicious and nutritious breakfast casserole perfect for family gatherings or meal prep. Packed with flavorful Italian sausage, fresh spinach, sautéed mushrooms, and creamy mozzarella cheese, this egg bake is easy to prepare and bakes to golden perfection, delivering a satisfying protein-rich meal ready in just 45 minutes.

Ingredients

Scale

Egg Mixture

10 large eggs
1/2 cup milk
1/2 teaspoon salt
1/4 teaspoon black pepper

Meat and Vegetables

1 pound Italian sausage
3 cups fresh spinach
2 cups sliced mushrooms

Cheese and Oil

1 cup shredded mozzarella cheese
2 tablespoons olive oil

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Instructions

Preheat and Prepare Baking Dish: Preheat your oven to 375°F (190°C) and grease a 9×13-inch baking dish to prevent sticking.
Cook the Sausage: Heat 1 tablespoon of olive oil in a skillet over medium heat. Add the Italian sausage and cook it until browned and fully cooked, about 6–8 minutes. Once done, transfer the sausage to a plate to cool slightly.
Sauté Mushrooms and Spinach: In the same skillet, add the remaining tablespoon of olive oil. Add the sliced mushrooms and cook for about 5 minutes until they are browned. Then stir in the fresh spinach and sauté until wilted. Remove the skillet from heat.
Mix Eggs and Seasonings: In a large mixing bowl, whisk together the eggs, milk, salt, and black pepper until the mixture is smooth and uniform.
Combine All Ingredients: Add the cooked sausage, sautéed mushrooms and spinach, and shredded mozzarella cheese to the egg mixture. Stir everything together well to ensure even distribution.
Transfer to Baking Dish: Pour the combined mixture into the prepared baking dish and use a spatula to smooth the top evenly.
Bake the Egg Casserole: Place the baking dish in the preheated oven and bake for 30–35 minutes, or until the center is just set and the edges are golden brown.
Cool and Serve: Remove the dish from the oven and let it cool for about 5 minutes before slicing into servings. This helps the casserole set further and makes slicing easier.

Notes

You can substitute Italian sausage with turkey sausage for a leaner option.
For extra flavor, add chopped onions or garlic when sautéing mushrooms.
This casserole can be made a day ahead and reheated in the oven or microwave.
If you prefer a dairy-free version, substitute milk and mozzarella with plant-based alternatives.
Use fresh herbs like basil or parsley to garnish before serving for added freshness.