01 - Set your grill or grill pan 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, kosher salt, and black pepper. Stir until a smooth paste forms.
03 - Coat each chicken breast evenly on both sides with the spice marinade, pressing gently to adhere the seasoning to the meat.
04 - Place the seasoned chicken onto the hot grill and 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 and lay a slice of Pepper Jack cheese on top. 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 lime wedges for squeezing over the top.