Place the carrots, celery, green bell pepper, baking potatoes, onion, garlic cloves and diced tomatoes in the slow cooker.
Sprinkle with parsley, Italian seasoning, white pepper, and red pepper flakes, mix well.
Add in the chicken breast and chicken stock. Mix well until everything is covered.
Cook on low heat for 8 hours.
Once soup is ready, bring a pot of water to a boil. Add 1 tablespoon salt, and add in the ditalini pasta once the water is boiling.
Cook for 10 minutes, drain, rinse and set to the side.
Remove the chicken breast from the slow cooker. Shred in a bowl and place back in the soup pot.
Ladle chicken soup in bowls and top with ¼ cup cooked ditalini noodles per bowl.