Marinate the Chicken: In a bowl, combine chili powder, cumin, garlic powder, salt, and pepper. Rub this mixture onto the chicken breasts. Let it marinate for at least 15 minutes.
Cook the Chicken: Preheat a grill or skillet over medium-high heat. Cook the marinated chicken for about 6-7 minutes on each side or until fully cooked and juices run clear. Remove from heat and let it rest for a few minutes.
Prepare the Rice: While the chicken is cooking, prepare the rice according to package instructions. Fluff it with a fork once done.
Char the Corn: If using fresh corn, grill or sauté it until it’s slightly charred. If using frozen corn, simply heat it in a skillet until warm.
Assemble the Bowls: In meal prep containers, start with a base of rice. Slice the grilled chicken and place it on top, followed by the charred corn.
Add Toppings: Sprinkle crumbled cotija cheese over the chicken and corn. Finish with a squeeze of lime juice.
Garnish and Store: If desired, sprinkle with fresh cilantro. Store the bowls in the refrigerator for up to 4 days.