Step 1

Combine chicken, tomatoes, broth, onion, bell pepper, garlic, Italian seasoning, pepper, salt, crushed red pepper and bay leaf in a 4-quart slow cooker. Cover and cook on High until the chicken is tender and an instant-read thermometer inserted into the thickest part of the chicken registers 165 degrees F, about 3 hours. Remove and discard the bay leaf. Transfer the chicken to a plate; let rest for 10 minutes.

Step 2

Meanwhile, stir pasta into the mixture in the slow cooker; cover and cook on High until the pasta is tender, about 30 minutes.

Step 3

Coarsely shred the chicken and stir it back into the soup, along with basil and parsley. Ladle the soup evenly into 6 bowls; sprinkle with Parmesan and garnish with parsley, if desired.