Italian Sausage & Pepper Casserole

If you’re searching for a meal that’s hearty, comforting, and packed with bold Italian flavors, look no further than this Italian Sausage & Pepper Casserole. Combining savory sausage with colorful bell peppers, aromatic onions, garlic, and a rich tomato sauce, it’s a complete meal in one dish. Topped with gooey melted mozzarella cheese, it’s a dish that satisfies every craving for comfort food while remaining simple enough for a weeknight dinner.

This casserole is perfect for feeding a family, entertaining guests, or making ahead for busy days. With 45 minutes from start to finish, you get a satisfying Italian-inspired meal without hours in the kitchen.

Why You’ll Love This Italian Sausage & Pepper Casserole

• Quick and easy – Minimal prep, fast cooking, all in one pan and a casserole dish.
• Bold, comforting flavors – Italian sausage, garlic, and peppers create a robust, savory dish.
• Crowd-pleaser – Perfect for family dinners, potlucks, or game day gatherings.
• Customizable – Use turkey sausage for a lighter version or adjust spice levels.
• Gluten-free option – Naturally gluten-free when served on its own or over gluten-free pasta.
• Make-ahead friendly – Prepare in advance and reheat for a fuss-free meal.

Ingredients Breakdown

This recipe serves 4 people. Here’s everything you’ll need:

Main Ingredients

• 1 pound Italian sausage (or turkey sausage for a lighter option)
• 2 bell peppers (1 red, 1 green), sliced
• 1 onion, chopped
• 3 cloves garlic, minced

Sauce & Seasonings

• 1 can (14.5 oz) diced tomatoes
• 1 can (8 oz) tomato sauce
• 1 teaspoon Italian seasoning
• Salt and pepper, to taste

Topping

• 1 cup shredded mozzarella cheese

Tools & Equipment Needed

• Large skillet or frying pan
• Cutting board and chef’s knife
• Measuring cups and spoons
• Wooden spoon or spatula
• 9×9-inch casserole dish (or equivalent)
• Oven preheated to 375°F (190°C)

Optional:

• Small mixing bowl for seasoning
• Aluminum foil for covering during baking if desired

Step-by-Step Instructions

1. Preheat the Oven

Set your oven to 375°F (190°C) so it’s ready when the casserole mixture is prepared. Preheating ensures even cooking and perfectly melted cheese on top.

2. Cook the Sausage

In a large skillet over medium heat, add 1 pound Italian sausage. Cook until browned and fully cooked, breaking it into small crumbles as it cooks. This step builds a rich base of flavor for your casserole.

3. Sauté Vegetables

Add sliced bell peppers, chopped onion, and minced garlic to the skillet. Sauté for 5–7 minutes, or until the vegetables are tender and fragrant. This softens the peppers and onions while keeping a slight crunch that contrasts nicely with the cheesy topping.

4. Add Tomato Base and Seasonings

Stir in 1 can diced tomatoes, 1 can tomato sauce, 1 teaspoon Italian seasoning, salt, and pepper. Mix everything thoroughly so the sausage and vegetables are evenly coated in the sauce.

5. Transfer to Casserole Dish

Pour the mixture into a casserole dish. Smooth it out so it cooks evenly. Top with 1 cup shredded mozzarella cheese, spreading it evenly across the surface.

6. Bake

Place the casserole in the preheated oven and bake for 25–30 minutes, or until the cheese is bubbly and golden. The sauce should be simmering gently around the edges.

7. Serve

Allow the casserole to cool for a few minutes before serving. This dish can be enjoyed on its own, served with crusty bread, or spooned over pasta for a complete Italian meal.

Tips & Variations

• Lighter option: Use turkey sausage or chicken sausage for a lower-fat alternative.
• Add extra vegetables: Zucchini, mushrooms, or cherry tomatoes can be incorporated for extra nutrition and color.
• Spice it up: Add red pepper flakes or a pinch of cayenne to the sauce for a mild kick.
• Cheese variations: Try provolone, fontina, or parmesan for a different cheesy layer.
• Make-ahead: Prepare the sausage and pepper mixture in advance and store in the fridge. Add cheese and bake when ready.

Flavor Profile & Pairings

The Italian Sausage & Pepper Casserole is savory, slightly sweet from bell peppers, and rich with tomato flavor. Garlic and Italian seasoning elevate the dish with aromatic depth, while melted mozzarella adds a creamy, indulgent finish.

Suggested Side Dishes

• Garlic bread or crusty Italian loaf
• Simple green salad with balsamic vinaigrette
• Roasted or steamed vegetables
• Gluten-free pasta or zucchini noodles for a complete meal

Nutritional Overview (Per Serving)

Nutrient	Amount
Calories	350 kcal
Protein	25 g
Fat	20 g
Saturated Fat	8 g
Unsaturated Fat	10 g
Carbohydrates	20 g
Fiber	3 g
Sugar	4 g
Sodium	800 mg
Cholesterol	70 mg

Dietary Notes: Gluten-free, high protein, suitable for low-carb variations when served over vegetables instead of pasta.

Make-Ahead & Meal Prep Tips

• Prepare in advance: Cook sausage and vegetables the day before. Assemble and refrigerate, then bake when ready.
• Storage: Refrigerate leftovers in an airtight container for 3–4 days.
• Reheat: Microwave or oven reheat until cheese is bubbly and warm.
• Freezing: Casserole can be frozen before baking. Cover tightly and bake from frozen, adding extra 10–15 minutes to baking time.

FAQs

1. Can I use turkey sausage?
Yes! Turkey sausage is a leaner option and works beautifully in this casserole.

2. Can I make this dairy-free?
Skip the mozzarella or use a plant-based cheese alternative.

3. Can I add more vegetables?
Absolutely! Zucchini, mushrooms, eggplant, or cherry tomatoes work well.

4. Is this gluten-free?
Yes, naturally gluten-free. Just serve over gluten-free pasta if desired.

5. How can I make it spicier?
Add red pepper flakes or a pinch of cayenne when sautéing the sausage and vegetables.

Cooking Timeline (At a Glance)

Step	Time
Prep vegetables and sausage	15 mins
Sauté sausage & vegetables	10 mins
Assemble casserole	5 mins
Bake	25–30 mins
Total	45 mins

Serving Suggestions

• Slice into portions for individual servings.
• Serve with fresh basil or parsley for a pop of color.
• Pair with garlic bread or a crisp green salad for a complete Italian meal.

Recipe Variations

1. Cheesy Veggie Casserole: Add zucchini, mushrooms, and extra mozzarella.
2. Spicy Italian Twist: Use hot Italian sausage and a pinch of red pepper flakes.
3. Pasta Bake: Serve over cooked pasta and bake with additional cheese on top.
4. Low-Carb Option: Serve over zucchini noodles or cauliflower rice.

Ingredient Spotlight

Italian Sausage: Adds rich, savory flavor and a slightly spicy kick. Look for high-quality, fresh sausage for best results.

Bell Peppers: Sweet and crunchy, they provide color, nutrients, and balance to the richness of the sausage and cheese.

Pro Cooking Tips

• Brown sausage thoroughly for added flavor before combining with vegetables.
• Slice peppers thinly to ensure they cook evenly in the oven.
• Let casserole rest 5 minutes after baking for easier serving and better flavor melding.

Storage & Freezing Guide

• Refrigeration: Store in an airtight container for 3–4 days.
• Freezing: Assemble without cheese and freeze. Add cheese and bake when ready.
• Reheating: Oven preferred for best texture; microwave works for convenience.

Nutrition Estimate Table (Per Serving)

Nutrient	Amount	Notes
Calories	350 kcal	Balanced portion for dinner
Protein	25 g	Lean protein from sausage
Fat	20 g	Includes saturated and unsaturated fats
Carbs	20 g	From tomato base and vegetables
Fiber	3 g	From bell peppers and onions
Sodium	800 mg	Can adjust salt or use low-sodium tomato products

Expanded Conclusion

This Italian Sausage & Pepper Casserole is a perfect marriage of flavor, comfort, and simplicity. With tender sausage, sweet bell peppers, savory tomato sauce, and melted mozzarella, every bite feels indulgent and satisfying. Whether you’re cooking for family, entertaining guests, or meal-prepping for the week, this dish delivers both convenience and taste.

Make it your go-to casserole for busy weeknights, cozy dinners, or anytime you crave a hearty Italian-inspired meal. It’s easy to assemble, quick to bake, and always a crowd-pleaser.

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