01 - Set your grill to medium-high heat, targeting approximately 400°F. Allow grates to fully heat 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 uniform 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 and cook for 5 to 6 minutes per side. The chicken is done when juices run clear and the internal temperature reaches 165°F.
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 piece. 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 before serving.
07 - Scatter chopped cilantro and diced red onion over each chicken breast. Serve alongside fresh lime wedges.