To slow cooker add: corn, beans, tomato sauce, chicken stock, red pepper flakes, taco seasoning and chicken breasts on top but covered a bit with the sauce.
Cook for 10 hours on low or 6 hours on high
30 minutes before it is done take chicken out and shred between two forks.
Shred to desired thickness.
Add chicken back to slow cooker and finish cooking
Cook or steam rice
Serve atop the rice mixture with your choice of toppings voila!