01 - In a large Dutch oven or soup pot over medium heat, cook the Italian sausage, breaking it apart with a spoon, until browned and cooked through. Drain excess fat if necessary.
02 - Add chopped onion, garlic, and red bell pepper. Sauté for 3-4 minutes until softened and fragrant.
03 - Stir in crushed tomatoes, diced tomatoes, chicken broth, basil, oregano, thyme, red pepper flakes, salt, and black pepper. Bring to a gentle boil, then reduce heat and simmer for 15 minutes.
04 - Add cheese tortellini and cook according to package directions (usually 5-7 minutes) until tender.
05 - Stir in heavy cream for a richer, creamier soup.
06 - Remove from heat, then stir in mozzarella and Parmesan until melted and combined.
07 - Ladle soup into bowls and garnish with fresh basil or parsley.