This Make-Ahead Sausage Casserole is perfect for busy mornings or dinner prep. Packed with savory sausage, tender vegetables, and cheesy goodness, it’s a hearty, crowd-pleasing dish that you can prepare in advance and bake whenever you need a comforting meal.
🛒 Ingredients (Serves 6–8)
1 lb (450 g) breakfast or Italian sausage, casing removed
1 medium onion, chopped
1 red bell pepper, diced
1 green bell pepper, diced
2 cloves garlic, minced
4 cups cubed bread (day-old works best)
1 ½ cups shredded cheddar cheese
6 large eggs
1 ½ cups milk
1 tsp Dijon mustard (optional)
1 tsp salt
½ tsp black pepper
½ tsp paprika
Fresh parsley for garnish (optional)
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Step-by-Step Instructions
Step 1 — Cook the Sausage
In a large skillet over medium heat, cook the sausage until browned, breaking it into small pieces. Remove excess grease if necessary.
Step 2 — Sauté Vegetables
Add onion, bell peppers, and garlic to the skillet with sausage. Sauté until softened, about 5–7 minutes. Remove from heat.
Step 3 — Assemble the Casserole
In a greased 9×13-inch baking dish, layer cubed bread evenly.
Spread the cooked sausage and vegetable mixture over the bread.
Sprinkle shredded cheddar cheese on top.
Step 4 — Prepare the Egg Mixture
In a large bowl, whisk together eggs, milk, Dijon mustard (if using), salt, pepper, and paprika. Pour evenly over the casserole.
Step 5 — Make Ahead or Bake
To make ahead: Cover the casserole tightly with foil and refrigerate overnight (up to 24 hours).
To bake immediately: Preheat oven to 350°F (175°C) and bake covered for 30 minutes, then uncover and bake another 15 minutes until the top is golden and the center is set.
If refrigerated overnight: Bake at 350°F (175°C) for 45–50 minutes, uncovering for the last 10–15 minutes.
Step 6 — Serve
Let the casserole cool for 5 minutes before slicing. Garnish with fresh parsley if desired. Serve warm for a filling breakfast, brunch, or dinner.
💡 Tips & Variations
Swap cheddar for Swiss, mozzarella, or pepper jack for a different flavor.
Add cooked mushrooms or spinach for extra veggies.
Use gluten-free bread to make this dish gluten-free.
This casserole freezes well—wrap tightly and freeze for up to 2 months.
This Make-Ahead Sausage Casserole is savory, cheesy, and convenient, making it a perfect solution for busy mornings or a hearty, comforting dinner.