In a large, oven-safe 12-inch skillet, heat 1 Tablespoon olive oil over medium-high heat. Add 1 onion, diced and 1 green bell pepper, diced. Cook for about 5 minutes until softened.
Add 1 pound Italian sausage to the skillet, breaking it up with a spoon. Cook until no longer pink.
Stir in 3 cloves garlic, minced and cook for 30-45 seconds until fragrant.
Pour in 24 ounce jar marinara sauce, 1 ½ teaspoons Italian seasoning, and ½ cup water. Stir well. Season with salt and pepper, to taste.
Add 20 ounce package of refrigerated cheese tortellini to the sauce mixture and stir to coat.
Sprinkle ¼ cup grated parmesan cheese and 2 cups shredded mozzarella cheese evenly over the tortellini. Arrange 20-25 pepperoni slices on top.
Place the skillet (uncovered) in the oven and bake for 18-20 minutes until bubbly and golden.
Garnish with chopped basil if desired and serve immediately.
Notes
Please refer to my FAQ’s (Frequently Asked Questions) and ingredient list above for other substitutions or for the answers to the most common questions.
This makes 4-6 servings depending on your serving size.