Cook the rice: Prepare your rice according to package directions. Fluff and keep warm.
If using cauliflower rice, sauté it with a little olive oil and salt for 3–5 minutes.
Mix the spice blend: In a small bowl, combine chili powder, cumin, smoked paprika, garlic powder, onion powder, salt, and pepper. Add cayenne if you like heat.
Season the chicken: Pat the chicken dry, drizzle with olive oil, and rub with the spice blend. Squeeze the lime juice over the chicken and let it sit while you prep the veggies.
Cook the chicken: Heat a large skillet over medium-high.
Add a light drizzle of oil if needed. Cook chicken 4–6 minutes per side, depending on thickness, until the center is no longer pink and juices run clear. Let it rest 5 minutes, then slice or chop.
Sauté the veggies (optional): In the same skillet, add the bell pepper and red onion with a pinch of salt.
Cook 3–4 minutes until slightly softened and charred at the edges. This step adds flavor but you can keep them raw for extra crunch.
Warm the beans and corn: Stir the black beans and corn in the skillet for 1–2 minutes, just to heat through and pick up the pan flavors. Season with a pinch of salt.
Make the sauce: Stir Greek yogurt, lime juice, hot sauce, salt, and pepper in a small bowl until smooth.
Adjust to taste with more lime or hot sauce.
Assemble the bowls: Add a scoop of rice to each bowl. Top with beans and corn, chicken, sautéed or raw peppers and onions, tomatoes, avocado, and cilantro.
Finish and serve: Drizzle with the yogurt sauce and add a squeeze of lime. Taste and add a pinch of salt if needed.