01 - Preheat your grill to medium-high heat, targeting approximately 400°F. Ensure the grates are clean and lightly oiled to prevent sticking.
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 - Pat the chicken breasts dry with paper towels. Rub the spice marinade evenly over both sides of each breast, ensuring full coverage for maximum flavor penetration.
04 - Place the seasoned chicken onto the preheated 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 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. This allows the juices to redistribute throughout the meat for a more tender bite.
07 - Scatter chopped fresh cilantro and finely diced red onion over each chicken breast. Serve immediately with lime wedges on the side for squeezing.