Place chicken into a large soup pot.
Add prepared onion, celery, carrots, bell peppers, potatoes, tomatoes and juices.
Add cold water until chicken is fully covered by 1 inch.
Place on stovetop over high heat and bring to boil. Skim off foam that rises to surface.
Add parsley, garlic, 1 tablespoon salt and 1 teaspoon black pepper.
Reduce heat to medium-low.
Loosely cover pot (allow a bit of space for steam to escape).
Simmer until chicken is cooked and falling off bone, about 2 hours.
Transfer chicken to bowl. Allow to cool about 20 minutes. Keep pot simmering.
When cool enough to touch, remove chicken meat from the bones. Tear chicken into bite-sized pieces. Discard skin and bones.
Prepare pasta according to package directions. Drain.
Mash some of the potatoes in pot to lightly thicken broth.
Add chicken and pasta to the soup. Stir to mix.
Taste. Add salt and pepper, to taste.