Season the chicken: Pat the chicken dry. In a bowl, mix olive oil, chili powder, cumin, smoked paprika, garlic powder, onion powder, cayenne (if using), salt, and pepper. Rub all over the chicken and let it sit while you prep the rest.
Make the sauce: Whisk Greek yogurt, mayonnaise, lime juice, honey, garlic, chili powder, smoked paprika, salt, and pepper.
Taste and adjust lime or salt. Refrigerate until serving.
Char the corn: Heat a large skillet or grill pan over medium-high. Add 1 tsp oil.
Cook corn 5–7 minutes, stirring occasionally, until lightly charred in spots. Sprinkle with a pinch of salt. Transfer to a bowl.
Cook the chicken: In the same hot pan (or on an outdoor grill), cook chicken 4–6 minutes per side, depending on thickness, until cooked through and juices run clear.
Internal temperature should reach 165°F (74°C). Rest 5 minutes, then slice or dice.
Prep the base and toppings: Warm brown rice if desired. Rinse black beans.
Chop tomatoes, red onion, jalapeño, and cilantro. Slice avocado. Crumble cheese.
Assemble the bowls: Divide rice among 4 bowls.
Top with black beans, charred corn, chicken, tomatoes, onion, jalapeño, and avocado. Spoon the yogurt-lime sauce over the top. Sprinkle with cilantro and cotija.
Finish with a squeeze of fresh lime.
Adjust and serve: Add extra chili powder or hot sauce if you want more heat. For a lighter bowl, use more veggies and less rice. Eat warm or at room temperature.