Frozen Lemonade Pie
["1 (14 oz.) can sweetened condensed milk", "1 (6 oz.) can frozen lemonade concentrate, thawed and undiluted", "1 (12 oz.) container whipped topping", "2 (9-inch) or deep-dish prepared graham cracker crusts", "lemon slices, fresh mint (garnish)"]
["Fold sweetened condensed milk and lemonade concentrate into whipped topping; spoon into crusts.", "Freeze until firm.", "Garnish, if desired."]
["condensed milk", "frozen lemonade concentrate", "graham cracker crusts", "lemon slices"]