Combine all ingredients in slow cooker except tortellini.
Cook on high for 2 hours
Prepare tortellini according to package and add to soup.
Garnish bowls of soup with cheese.
Notes
Quick Stove Top AlternateIf you don't have 2 hours to crock, you can easily convert this recipe to a quick soup on the stove. Just heat your tomatoes, broth and spinach to a boil and add the tortellini right to the soup (no pre-boil) and cook until your tortellini are done. Dinner's on the table in about 20 minutes.