Frozen Lime Pie

1 8 oz tub frozen nondairy whipped topping, thawed slightly (like Cool Whip)
1 14 oz can sweetened condensed milk
1/2 cup fresh lime juice
1 6 oz prepared graham cracker pie crust

In a medium bowl, combine the whipped topping, condensed milk and lime juice until blended and smooth.  Spoon the mixture into the crust and smooth the surface.  Freeze until firm, about 30 minutes.  (You can keep frozen for up to 3 months)