How to Make It
Preheat grill to medium-high (400°F to 450°F). Stir together black pepper, cumin, chili powder, and 1/2 teaspoon of the salt in a small bowl. Brush pork chops with 1 tablespoon of the oil; rub with black pepper mixture. Set aside.
Stir together tomatoes, cilantro, onion, serrano, garlic, lime zest, lime juice, and remaining 1 tablespoon oil and 1 teaspoon salt in a bowl.
Place pork chops on oiled grates. Grill, covered, turning occasionally, until a thermometer inserted in thickest portion of meat registers 145°F, about 6 minutes. Remove from grill; let rest 5 minutes. Serve over rice with pico de gallo.