01 - In a medium saucepan, combine rice, water, and salt. Bring to a boil, reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed. Remove from heat and let sit, covered, for 5 minutes. Fluff with a fork.
02 - In a bowl, combine olive oil, chili powder, smoked paprika, garlic powder, cumin, salt, black pepper, and lime juice. Add chicken breasts and coat evenly. Let marinate for at least 10 minutes.
03 - Preheat a grill pan or skillet over medium-high heat. Grill chicken breasts for 6-7 minutes per side, or until fully cooked and juices run clear. Rest for 5 minutes, then slice.
04 - In a skillet over medium-high heat, add corn kernels and cook for 3-4 minutes until lightly charred. Remove from heat and transfer to a bowl. Stir in mayonnaise, sour cream, cotija cheese, chili powder, lime juice, cilantro, salt, and pepper.
05 - Divide rice among three bowls. Top each with sliced chicken, a generous scoop of street corn, avocado slices, and diced red onion. Garnish with extra cilantro and lime wedges.