Add the olive oil to a large oven-safe pan over medium heat. Add the onion, green pepper, and red pepper and cook until softened.
Add the hot Italian sausage, breaking it up as it cooks. Season with garlic powder, onion powder, Italian seasoning, and parsley. Cook until the sausage is completely browned.
Add the minced garlic and cook for about 2 minutes.
Pour in the chicken broth and stir to combine. Add the marinara sauce and refrigerated tortellini and give everything a good stir.
Cover with a lid and cook for 12 minutes, stirring halfway through.
Top with the freshly grated mozzarella cheese. Cover again and cook for 2–3 minutes, or until the cheese is completely melted.
Garnish with parsley and serve!