Step 1: Marinate the Chicken: In a medium bowl, whisk together avocado oil, lime juice, chili powder, cumin, smoked paprika, garlic powder, salt, and pepper. Coat the chicken evenly in the marinade and let it sit for at least 20 minutes (or up to 4 hours for deeper flavor).
Step 2: Grill the Chicken and Corn: Preheat the grill to medium-high heat and cook the marinated chicken for about 6-7 minutes per side, or until the internal temperature reaches 165°F. Let the chicken rest for 5 minutes before slicing. Brush the corn with avocado oil and season with salt and pepper. Grill for 10-12 minutes, turning occasionally, until the corn kernels are slightly charred. Cut the kernels off the cob and transfer to a bowl.
Step 3: Make the Corn Salad: Mix the grilled corn, red onion, sour cream, mayonnaise, cotija cheese, chili powder, garlic powder, smoked paprika, salt, and pepper. Squeeze in fresh lime juice and mix well until all ingredients are combined.
Step 4: Prepare the Rice: Cook jasmine rice according to package instructions. Fluff with a fork and mix in chopped cilantro and fresh lime juice.
Step 5: Assemble the Bowls: Start with a base of cilantro-lime rice. Add sliced grilled chicken. Spoon the corn salad over the top. Add black beans, if using. Add optional garnishes such as lime wedges, cherry tomatoes, jalapeños, guacamole, pico de gallo, green onions, hot sauce, additional cilantro, or lettuce.