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Italian Sausage and Pepper Casserole

Italian Sausage and Pepper Casserole

A classic Italian-inspired casserole made with savory sausage, tender bell peppers, onions, and garlic simmered in tomato sauce and finished with melted mozzarella. Comforting, hearty, and perfect for weeknight dinners or meal prep.
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Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings: 4 servings
Course: Main Dish
Cuisine: Italian-American
Calories: 480
Ingredients Equipment Method Notes

Ingredients
  

  • 1 lb Italian sausage
  • 2 bell peppers (red and green), sliced
  • 1 onion, chopped
  • 3 cloves garlic, minced
  • 14.5 oz diced tomatoes
  • 8 oz tomato sauce
  • 1 tsp Italian seasoning
  • salt, to taste
  • black pepper, to taste
  • 1 cup shredded mozzarella cheese

Equipment

  • Large skillet
  • cutting board and knife
  • wooden spoon
  • Measuring spoons
  • Oven-safe casserole dish
  • oven

Method
 

  1. Preheat oven to 375°F (190°C). In a large skillet over medium heat, cook Italian sausage until fully browned, breaking it into crumbles.
  2. Add bell peppers, onion, and garlic to the skillet. Sauté until vegetables are softened and fragrant.
  3. Stir in diced tomatoes, tomato sauce, Italian seasoning, salt, and black pepper. Simmer for 3–5 minutes.
  4. Transfer the sausage mixture to a greased oven-safe casserole dish and spread evenly.
  5. Top with shredded mozzarella cheese. Bake uncovered for 25–30 minutes until cheese is melted and bubbly.
  6. Let casserole rest for 5 minutes before serving.

Notes

  • Turkey sausage works well for a lighter dish
  • This casserole pairs perfectly with pasta or bread
  • Ideal for meal prep and reheating
  • Flavor improves even more the next day