1Heat coals or gas grill for direct heat. Mix beef, onions and pepper. Shape into 12 patties, each about 3/4 inch thick.
2Cover and grill patties 3 to 4 inches from medium heat 10 to 11 minutes, turning once, until no longer pink in center and juice is clear.
3Place burgers on bottom half of buns. Spoon dressing onto burgers; top each with 2 pieces of bacon. Top with top half of buns.