1 lb Italian sausage (mild or spicy, based on your preference)
1 small onion, diced
3 cloves garlic, minced
6 cups chicken broth
1 can (14.5 oz) diced tomatoes, undrained
1 package (9 oz) refrigerated cheese tortellini
1 cup heavy cream
2 cups fresh spinach, roughly chopped
1 teaspoon dried basil
1 teaspoon dried oregano
Salt and pepper to taste
Grated Parmesan cheese (for serving, optional)