8 oz. cream cheese
3/4 c. sugar
1 can sweetened condensed milk
1/2 c. fresh lime juice
green food coloring
2 c. whipped topping, thawed
1 prepared graham cracker crust

Mix together cream cheese and sugar; combine with sweetened condensed milk and lime juice. Add a few drops of green food coloring. Fold in topping. Pour into crust and chill at least 3 hours before serving.