Chicken Taco Soup

(serves 6-8)
1 pound boneless, skinless chicken breast, cooked & shredded (optional)
1 onion, chopped
1 clove garlic, minced
2 cans chicken/vegetable broth
1 can Rotel tomatoes & chiles, in liquid
1 can black beans, drained & rinsed
1 can kidney beans, in liquid
1 can corn, drained
2 tablespoons chili powder
red pepper flakes
salt
pepper

Combine ingredients in a crockpot (add chili powder, red pepper flakes, salt & pepper to taste). Cook on low overnight. Serve with tortilla chips and your favorite Mexican garnishes.