Summer Pie
["1 (15 oz.) can crushed pineapple with juice", "1 can sweetened condensed milk", "1 (8 oz.) carton Cool Whip, softened", "1/4 c. lemon juice", "1/2 c. chopped walnuts (if desired)", "1 graham cracker crumb pie shell"]
["Mix together pineapple, milk, Cool Whip, lemon juice and nuts. Pour into pie shell.", "Freeze.", "Don't take it out until ready to slice and serve."]
["pineapple", "condensed milk", "lemon juice", "walnuts", "graham cracker crumb pie shell"]