Brown sausage in a large saucepan. Add onions and carrots; saute 3 min. Stir in mushrooms and garlic and saute another 3 min.
Add broth, stewed tomatoes and tomato sauce, and bring to a boil. Drop in pasta and simmer until cooked about 10 min. Stir in spinach and cook until wilted.
Place 1/4 cheese into each serving bowl and pour soup on top. Garnish with parmesan and basil.