1In a large pot, cook the Italian sausage over medium heat until browned. Remove and set aside.
In the same pot, add the diced onion and cook until translucent, about 5 minutes.
Add the minced garlic and cook for another 1-2 minutes until fragrant.
Pour in the chicken broth, diced tomatoes, and tomato sauce. Stir to combine.
Add the dried basil, dried oregano, and red pepper flakes. Season with salt and pepper to taste.
Bring the mixture to a boil, then reduce the heat and let it simmer for 10 minutes.
Add the broken lasagna noodles to the pot and cook until they are tender, about 10-12 minutes.
Stir in the cooked sausage and let it heat through.
In a small bowl, combine the ricotta cheese, grated Parmesan cheese, and shredded mozzarella cheese.
Serve the soup hot, with a dollop of the cheese mixture on top of each bowl.