1 (9-inch) graham cracker crust
1 (14-ounce) can sweetened condensed milk
1/4 cup fresh lime juice
1/4 cup fresh lemon juice
2 to 3 drops green food coloring (optional)
1 cup heavy cream
Combine milk, lime juice, lemon juice and food coloring if using.
Whip the cream until stiff. Fold into lime mixture. Pour into pie crust and freeze for 4 hours or until firm.
Makes 8 servings.