Additional fresh raspberries and fresh mint, optional
In a large bowl, stir together milk and lime juice. Mixture will begin to thicken. Beat in whipped topping and food coloring if desired. Gently fold in raspberries. Spoon into pie crust. Chill. Garnish with additional raspberries and mint if desired.
Graham cracker crust (9 inches): Combine 1-1/2 cups crushed graham cracker crumbs (24 squares), 1/4 sugar and 1/3 cup melted butter. Press onto the bottom and up the sides of an ungreased 9-in. pie plate. Bake at 375 until lightly browned, 8-10 minutes. Cool on a wire rack before filling.