HEAT barbecue to medium heat.
MIX meat and 2 Tbsp. dressing; shape into 8 thin patties. Mix remaining dressing and bacon; spoon onto centres of 4 patties. Top each with 2 Singles quarters and second patty; pinch edges together to seal.
GRILL 7 to 9 min. on each side or until done (160°F).
FILL buns with lettuce, burgers and tomatoes.
serving size = 1 burger (277 g)