Chicken Tortellini Soup

7 3/4 cups chicken broth
1 (14.5 ounce) can stewed tomatoes, cut up
1 (10 ounce) package frozen chopped spinach, thawed
1/4 cup grated Parmesan cheese
1/2 teaspoon salt
1/4 teaspoon pepper
1 (9 ounce) package refrigerated cheese tortellini
2 1/2 cups cubed cooked chicken

In a Dutch oven or soup kettle, combine the broth, tomatoes, spinach, Parmesan cheese, salt and pepper. Cook for 10 minutes; add the tortellini and chicken. Cook for 5 minutes or until tortellini is heated through.