1Heat gas or charcoal grill. In medium bowl, mix beef, chile pepper powder, salt and pepper. Shape mixture into 8 patties, 1/2 inch thick. In center of each of 4 patties, place 2 tablespoons cheese. Top with remaining patties; press edges to seal.
2Place patties on grill over medium heat. Cover grill; cook 13 to 15 minutes, turning once, until thermometer inserted in center of patties (inserted in meat, not cheese) reads 160°F. Serve burgers on buns with lettuce and tomato.