01 - Set your grill to medium-high heat, targeting approximately 400°F. Allow the grates to heat thoroughly for optimal searing.
02 - In a small mixing bowl, combine the olive oil, ground cumin, garlic powder, smoked paprika, salt, and black pepper. Stir until a smooth paste forms.
03 - Coat both sides of each chicken breast evenly with the spice mixture, pressing gently to adhere the marinade to the surface.
04 - Place the seasoned chicken onto the hot grill. Cook for 5 to 6 minutes per side until the internal temperature reaches 165°F and juices run clear.
05 - During the final 2 minutes of grilling, spoon 2 to 3 tablespoons of salsa verde over each chicken breast. Lay one slice of Pepper Jack cheese on top of each breast, close the grill lid, and allow the cheese to melt completely.
06 - Transfer the chicken off the grill and let it rest for 5 minutes to allow the juices to redistribute throughout the meat.
07 - Scatter chopped cilantro and diced red onion over each chicken breast. Serve immediately with fresh lime wedges on the side.