Heat oven to 375°F. Place margarine in 9-inch round cake pan. Place in oven for 3 to 4 minutes or until melted. Remove pan from oven; tilt to coat with margarine. Sprinkle brown sugar over margarine. Place 1 pineapple slice in center of pan; place 6 slices around edges. Fill spaces with dried cranberries. Return to oven; bake 6 to 7 minutes or until pineapple is heated.