HEAT grill to medium heat.
MIX meat, garlic powder and ¼ cup dressing just until blended; shape into 8 (1/2-inch-thick) patties. Grill 5 to 6 min. on each side or until done (160ºF).
COMBINE remaining dressing with all remaining ingredients except buns.
FILL buns with burgers and coleslaw.
SPECIAL EXTRA: Grill meat patties as directed. Top each with 1 KRAFT Singles; grill 1 min. or until melted. Continue as directed.