01 - In a mixing bowl, combine the olive oil, chili powder, smoked paprika, garlic powder, cumin, salt, pepper, and lime juice. Add the chicken breasts and toss to coat evenly. Let marinate for at least 10 minutes at room temperature, or refrigerate up to 2 hours for deeper flavor.
02 - Preheat a grill or grill pan over medium-high heat. Grill the chicken breasts for 6–7 minutes per side until fully cooked through (internal temperature reaches 165°F) and juices run clear. Transfer to a cutting board and rest for 5 minutes before slicing against the grain.
03 - Heat 1 tsp olive oil in a skillet over medium-high heat. Add the corn kernels, chili powder, and a pinch of salt. Cook for 3–5 minutes, stirring frequently, until the corn is lightly charred and tender. Remove from heat and set aside.
04 - In a small bowl, whisk together the Greek yogurt, light mayonnaise, lime juice, minced garlic, chili powder, and crumbled cotija cheese until smooth. Adjust seasoning to taste with additional salt or lime juice as needed.
05 - Divide the cooked brown rice or quinoa among 4 serving bowls. Arrange sliced chicken, charred street corn, black beans, cherry tomatoes, avocado slices, diced red onion, and chopped cilantro over the base in each bowl.
06 - Drizzle the creamy street corn sauce generously over each assembled bowl. Serve immediately with extra lime wedges and additional crumbled cotija cheese on the side if desired.