PREHEAT oven to 375°F. Spread pie filling into 9-inch pie plate; set aside.
COMBINE cookie crumbs, brown sugar and pecans in small bowl. Stir in margarine until well blended. Sprinkle over pie filling.
BAKE 25 to 30 min. or until hot and bubbly. Top each serving with 2 Tbsp. of the whipped topping just before serving. Garnish with fresh mint sprigs, if desired.
