Lemon Icebox Pie
["1 can sweetened condensed milk", "1 (9 oz.) container frozen whipped topping", "1/2 c. lemon juice or 1 (6 oz.) can frozen lemon concentrate, thawed", "1 graham cracker crust"]
["Mix the sweetened condensed milk and lemon juice until thick. Fold in whipped topping which has been partially thawed.", "Spoon into the graham cracker crust.", "Refrigerate at least 1 hour or overnight before serving."]
["condensed milk", "frozen whipped topping", "lemon juice", "graham cracker crust"]