In a large mixing bowl, toss the diced chicken breast with olive oil, chili powder, cumin, garlic powder, smoked paprika, and salt until evenly coated.
Heat a large non-stick skillet over medium-high heat and cook the chicken for 8 to 10 minutes, stirring occasionally, until the internal temperature reaches 165°F (74°C).
While the chicken cooks, prepare four meal prep containers by placing 0.5 cups of cooked brown rice in the base of each.
Distribute the cooked chicken evenly among the four containers.
Divide the black beans, corn, bell pepper, and cherry tomatoes into equal portions and arrange them over the rice and chicken.
Garnish each bowl with diced red onion and fresh cilantro.
Place a lime wedge in each container to be squeezed over the dish immediately before serving.
Store in airtight containers in the refrigerator for up to 4 days.