Bring chicken broth, pasta sauce, cannellino benas & crushed red pepper to a simmer. Turn heat to low. Season chicken with salt & pepper, add to broth. Gently poach chicken, stirring occasionally for about 2 minutes. Stir in baby spinach. continue cooking soup until spinach is wilted & chicken is done, about 2 minutes. Stir in basil, season with salt & pepper to taste. Ladle into bowls; top with cheese.