1 (14 oz.) can sweetened condensed milk
1 (20 oz.) can crushed pineapple (use juice)
Juice of 2 lemons
1 (8 oz.) carton whipped topping
2 graham cracker crusts

Stir together condensed milk, pineapple, lemon juice and whipped topping. Pour into pie crust. Refrigerate 3 to 4 hours.