Marinate the chicken by mixing olive oil, garlic powder, onion powder, smoked paprika, salt, and pepper. Coat the chicken and let it sit for 15-30 minutes.
Prepare the chimichurri sauce by combining parsley, cilantro, garlic, red pepper flakes, olive oil, red wine vinegar, salt, and pepper in a bowl.
Grill the marinated chicken on medium-high heat for 6-7 minutes on each side until the internal temperature reaches 165°F. Let it rest for 5 minutes before slicing.
Assemble the bowl with quinoa as the base, topped with cherry tomatoes, avocado, corn, mixed greens, sliced chicken, and chimichurri sauce.