Hi Pat,
Hope this is what you had in mind.

Lemon Pie

1 9 inch graham cracker crust
1 14 oz can sweetened condensed milk
1/2 cup lemon juice
1 8 oz carton Cool Whip, thawed

In a bowl, combine milk and lemon juice, mix until smooth, this will begin
to thicken. Fold in cool whip and spoon into crust. Chill til ready to serve.

Sincerely,
Donna