Poke holes in the sweet potato and bake it in the oven at 400 degrees for 45 minutes or 8 minutes in the microwave.
In a mixing bowl, mix the grilled chicken, thawed corn, cooked black beans and bbq sauce and season with black pepper and salt substitute. Stir until all ingredients have been evenly coated with sauce. Spoon the mixture into the middle of the sweet potato. Place the broccoli on top of the chicken mixture.