In a large pot or Dutch oven, brown the Italian sausage over medium-high heat.
Once the sausage is nicely browned, add the chicken broth, tomato sauce, and tomatoes with green chilies.
Bring the mixture to a boil.
Add the cheesy tortellini to the boiling soup. Be mindful of the cooking time indicated on the fresh pasta package to avoid overcooking but usually this takes roughly 10 minutes.
Season with Italian seasoning, a pinch of salt, and black pepper.
Once the tortellini is fully cooked, reduce the heat to medium-low and simmer the soup.
Add in the fresh spinach.
Allow to simmer until spinach shrinks and softens.
Stir in the heavy cream.
Ladle the soup into bowls and top each with a sprinkle of parmesan cheese.