01 - Preheat your grill to medium-high heat, approximately 400°F.
02 - Pat the chicken breasts dry with paper towels. In a small bowl, combine olive oil, garlic powder, cumin, smoked paprika, salt, and black pepper. Rub the spice mixture evenly over each chicken breast, ensuring full coverage.
03 - Place the seasoned chicken on the preheated grill. Cook for 6 to 7 minutes per side, or until the internal temperature reaches 165°F when measured with an instant-read thermometer.
04 - During the final 2 minutes of grilling, spoon ¼ cup of salsa verde over each chicken breast and top with a slice of pepper jack cheese. Close the grill lid to allow the cheese to melt completely.
05 - Remove the chicken from the grill and transfer to a clean platter or cutting board. Let rest for 5 minutes to allow the juices to redistribute throughout the meat.
06 - Sprinkle fresh chopped cilantro over the chicken breasts. Serve immediately with lime wedges on the side. Add avocado slices and diced tomatoes as desired for extra freshness and color.