Add black beans, corn, diced tomatoes, taco seasoning, and chicken broth.

Add shredded cheese and any optional toppings.

Cook rice separately.

Cover and cook on low for 5-6 hours or high for 3-4 hours.

Place chicken breasts in the slow cooker.

Remove chicken and shred with two forks.

Return shredded chicken to the slow cooker.

To serve, place rice in bowls and top with the chicken mixture.