01 - Set your grill or grill pan to medium-high heat, targeting approximately 400°F. Allow the grates to fully heat for optimal searing.
02 - In a small mixing bowl, combine the olive oil, ground cumin, garlic powder, smoked paprika, kosher 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 so the marinade adheres 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 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 piece, then close the grill lid to allow the cheese to melt completely.
06 - Transfer the chicken off the grill and let it rest for 5 minutes so the juices redistribute before serving.
07 - Scatter chopped cilantro and diced red onion over the chicken. Serve with lime wedges alongside rice, tortillas, or roasted vegetables.