Cook the rice according to package instructions and set aside.
Preheat your grill or skillet to medium-high heat.
Season the chicken breasts with salt, pepper, and any desired spices.
Grill the chicken for about 6-7 minutes on each side until fully cooked.
Remove chicken from heat and let it rest for a few minutes.
Slice the grilled chicken into strips.
In a bowl, layer cooked rice as the base.
Add black beans on one side of the rice.
Next to the beans, add grilled chicken slices.
Top the chicken with corn, diced tomatoes, and shredded lettuce.
Drizzle sour cream over the top and garnish with lime wedges and cilantro.