Sunny's Easy Cheesy Meatball Sub Casserole

All the flavors of a meatball sub baked into one cheesy casserole with a crunchy garlic-crouton topping.

Ingredients

• Nonstick cooking spray, for the baking dish
• 3 tablespoons olive oil
• 1/2 onion, diced
• 1 green bell pepper, cored, seeded and diced
• Kosher salt and freshly ground black pepper
• 2 cloves garlic, minced
• 1 teaspoon Italian seasoning
• Half a 32-ounce bag frozen store-bought meatballs, defrosted and sliced in half
• One 32-ounce jar marinara sauce
• Two 8-ounce bags Italian cheese blend
• One 5-ounce bag garlic croutons, crushed

Steps

1. Preheat the oven to 350°F. Spray a 9-by-13-inch baking dish with nonstick cooking spray.
2. Heat the olive oil in a medium skillet over medium heat. Add the onion and green pepper, then sprinkle with salt and pepper and sauté until tender, about 5 minutes. Add the garlic and Italian seasoning and cook for another 1 to 2 minutes. Remove from the heat and set aside.
3. In a large bowl, combine the meatballs, marinara sauce, and cheese. Add the cooked onion and pepper mixture. Mix to combine, then transfer to the prepared baking dish. Top with the crushed croutons. Bake until the cheese is melted and bubbling, 30 to 35 minutes. (If the topping starts to get too brown, loosely cover with foil toward the end of the bake.)

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