1/2 c. fresh lime juice
2 cans condensed milk
1 lg. Cool Whip
2 graham cracker crusts

In medium size mixing bowl pour milk and slowly fold in lime juice until all juice is blended (mixture will thicken if you don't stir it in fast).

Pour into crusts and refrigerate. When ready to serve, cover pie with thawed Cool Whip. Garnish with lime slices. Also, if you want pie tinted green, fold in 1 drop of green food coloring to pie mixture.