Enjoy this quick-and-easy snack after a barbecue. To heat on the barbecue, spread wafer with peanut butter as directed; place on sheet of heavy-duty foil. Top with marshmallow halves and chocolate chips as directed. Wrap loosely in foil. Place on barbecue grate. Grill on medium heat 1 min. or until marshmallows are puffed and chocolate is melted.