In a bowl, combine the chicken thighs, chipotle sauce, olive oil, cumin, garlic powder, onion powder, salt, and pepper. Toss to coat evenly. Allow the chicken to marinate for at least 30 minutes (or up to overnight in the fridge for more flavor).
While the chicken is marinating, cook the brown rice or quinoa according to package instructions. Set aside once cooked.
Heat a grill or skillet over medium-high heat. Add the marinated chicken thighs and cook for about 6-7 minutes per side, or until fully cooked and no longer pink in the center. Let the chicken rest for a few minutes, then slice into strips.
In a large serving bowl or individual bowls, start by adding a base of brown rice/quinoa. Top with black beans, corn, halved cherry tomatoes, diced avocado, and sliced chicken.
Sprinkle chopped cilantro over the top and drizzle with lime juice. Add sour cream or Greek yogurt and shredded cheese, if desired.
Mix ingredients together before diving in for the best flavor experience.