Saute' onion and garlic in pan until soft. Add Broth and chicken breasts and simmer until chicken shreds. You can use the Crock Pot for this so you can start in the morning and leave! Or start at night, shred chicken in the morning and finish in the crockpot in the afternoon.
After shredding chicken, add beans and spices and simmer for as long as you want in the crockpot or for at least 30 minutes in pan. Add corn and warm and serve with shredded cheese and a dollop of sour cream on top.