Cilantro Lime Chicken

1.5 pounds chicken (about 3 breasts)
1 can black beans, rinsed and drained
1 bag frozen corn
1-2 cups cilantro, chopped
juice from 2 limes
1/2 red onion (approximately 1 cup)
1 tsp. cumin
salt and pepper to taste (can be added later)

Toss in slow cooker, cook on low for about 4-6 hours (will cook longer if chicken is frozen).  Serve as tacos or over tortilla chips topped with sour cream and cheese.