01 - Set your grill to medium-high heat, targeting approximately 400°F. Allow grates to heat thoroughly for proper 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 uniform paste forms.
03 - Coat each chicken breast evenly on both sides with the spice marinade, pressing gently so the seasoning adheres to the meat.
04 - Place the seasoned chicken onto the hot grill grates. Cook for 5 to 6 minutes per side until the internal temperature registers 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. 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 so the juices redistribute throughout the meat.
07 - Scatter chopped cilantro and diced red onion over each chicken breast. Serve alongside lime wedges for squeezing.