Marinate Chicken: In a mixing bowl, combine chicken breasts with lime juice, olive oil, cumin, chili powder, salt, and pepper. Let marinate for at least 30 minutes.

Cook Rice: Rinse the rice under cold water until clear, then combine with water and a pinch of salt in a pot. Bring to a boil, reduce to simmer for 15-20 minutes until tender.

Prepare Veggies: Finely dice the red bell pepper and red onion, and mince the garlic. Set aside.

Cook Chicken: Heat a skillet over medium-high heat, drizzle in olive oil, and cook the marinated chicken for about 6-7 minutes per side until cooked through. Slice for serving.

Assemble Bowl: Place a layer of cooked rice in a bowl, followed by black beans, corn, diced veggies, and sliced chicken. Add optional toppings and finish with a squeeze of lime juice.