Cook the brown rice: Rinse the rice until the water runs clear. Add rice, broth (or water), and salt to a pot.
Bring to a boil, cover, and reduce to low. Cook 40–45 minutes until tender. Remove from heat, rest 10 minutes, then fluff.
Stir in lime juice and cilantro if using.
Season the chicken: In a small bowl, mix chili powder, cumin, smoked paprika, garlic powder, onion powder, oregano, salt, and pepper. Pat the chicken dry. Rub with olive oil and sprinkle the spice mix on both sides.
Finish with lime juice.
Cook the chicken: Heat a large skillet over medium-high. Add a drizzle of oil. Cook chicken 5–6 minutes per side, until browned and cooked through (internal temp 165°F/74°C).
Transfer to a plate to rest for 5 minutes, then slice.
Sauté the veggies: In the same skillet, add a bit more oil if needed. Toss in bell peppers and red onion with a pinch of salt. Cook 4–6 minutes until tender-crisp with some char.
Stir in corn for 1–2 minutes to warm through.
Warm the black beans: In a small saucepan over low heat, warm the beans with a splash of water and a pinch of salt. Keep them saucy so they don’t dry out.
Assemble the bowls: Add a scoop of brown rice to each bowl. Top with sliced chicken, sautéed peppers and onions, corn, black beans, tomatoes, and avocado.
Finish with toppings: Add cilantro, a squeeze of lime, and your favorite extras like salsa, cheese, or a dollop of Greek yogurt.
Adjust heat with hot sauce.