Pour chicken broth and tomato soup into large soup pot. (I pour in the tomato soup first, and then I pour the chicken broth into the tomato soup carton, shake it up, and then pour it out to help get out all of the soup from the carton.)
Add chicken breast, bring liquid to a simmer, reduce heat to medium-low, and cover for 1 hour or until chicken is fully cooked and easy to shred.
Using 2 forks, shred the chicken (I just shred it inside of the pot) into bite-sized pieces.
Stir in tortellini and cook for 7 minutes.
Add frozen broccoli and continue to cook on stove top until broccoli is warm – about 5 minutes.
Serve in bowls and top with Mozzarella or Parmesan cheese.