Place chicken breasts in bottom of slow cooker.
Add onion, garlic, tomatoes, chicken broth, beans and carrot to slow cooker.
Cook on high 5-6 hours or low 7-8 hours.
Minutes before serving, remove chicken breasts from pot and add zucchini, pasta and kale to the pot.
Use a fork to pull chicken off the bones. Chop or shred the meat and return to the slow cooker.
Season with salt and pepper.
Top each bowl with Parmesan, if desired.