Preheat your oven to 400°F (200°C).
Slice the bell pepper and zucchini into bite-sized pieces and place them on a baking sheet.
Drizzle the vegetables with half of the olive oil and season with a pinch of sea salt and black pepper.
Roast the vegetables in the oven for 15-20 minutes until they are tender and show slight char marks.
While vegetables roast, season the chicken breast evenly with garlic powder, smoked paprika, and the remaining salt and pepper.
Heat the remaining olive oil in a non-stick skillet over medium-high heat.
Cook the chicken for 6-7 minutes per side, or until the internal temperature reaches 165°F (74°C).
In a small saucepan or microwave-safe bowl, warm the cooked brown rice and black beans together.
Remove the chicken from the pan and let it rest for 3 minutes before slicing into strips.
Assemble the bowl by placing the rice and bean mixture at the bottom, then topping with the roasted vegetables and sliced chicken.
Drizzle the entire bowl with fresh lime juice just before serving.