In a large pot, cook sausage and ground beef until browned. Add onions and garlic, cooking until soft. Stir in Italian seasoning and red pepper flakes.
Add tomato paste, diced tomatoes, chicken broth, salt, and pepper. Bring to a boil, then reduce heat and simmer for 20 minutes.
Meanwhile, cook pasta according to package instructions. Drain and set aside.
Stir cooked pasta into the soup. In a small bowl, mix ricotta, Parmesan, and mozzarella cheeses.
Serve hot with a scoop of cheese mixture on top.
Notes
This lasagna soup is perfect for a comforting dinner, loaded with flavors and cheesy goodness.