Frozen Lemonade Pie
["1 (14 oz.) can sweetened condensed milk", "1 (6 oz.) can lemonade concentrate, thawed and undiluted", "1 (8 oz.) container frozen whipped topping, thawed", "2 (9-inch) prepared graham cracker crusts", "lemon slices (garnish)", "fresh mint (garnish)"]
["Fold sweetened condensed milk and lemonade concentrate into whipped topping.", "Spoon into crusts.", "Freeze until firm.", "Garnish pies, if desired.", "Yield:", "Two 9-inch pies.", "Freeze for 8 hours."]
["condensed milk", "lemonade concentrate", "frozen whipped topping", "graham cracker crusts", "lemon slices", "fresh mint"]