Cook rice according to package instructions and set aside.
Season the chicken breast with salt, pepper, and lime juice.
Grill the chicken until fully cooked, about 6-7 minutes per side.
Let the chicken rest for 5 minutes, then slice into strips.
In a bowl, layer the cooked rice at the bottom.
Add sliced grilled chicken on top of the rice.
Sprinkle black beans over the chicken (if using).
Add diced tomatoes and guacamole next.
Top with shredded cheese and chopped cilantro.
Squeeze additional lime juice over the bowl for extra flavor.