Begin by placing the boneless chicken breasts in the bottom of the crockpot.
In a large mixing bowl, combine the rinsed black beans, drained corn, diced tomatoes with green chilies, chopped bell pepper, chopped red onion, and minced garlic.
Add the taco seasoning and cumin to the vegetable mixture, then stir well until everything is nicely coated with the spices.
Spoon the vegetable mixture over the chicken in the crockpot. Ensure that the chicken is well covered.
Season with salt and pepper to taste.
Cover the crockpot and set it to cook on low for 6-8 hours or on high for 3-4 hours.
Once cooked, shred the chicken with two forks inside the crockpot and stir everything to combine the flavors well.
Serve hot, garnished with fresh cilantro and lime wedges on the side.
Notes
Serve the fiesta chicken in bowls over rice or tortillas, and top with avocado slices, shredded cheese, and additional cilantro for a colorful and appetizing meal.