This is no-bake except for the crust. If you are using the packaged lemon pie filling mix add in a couple tablespoons of fresh lemon juice just to "kick it up a notch" and also a couple drops of yellow food colouring if desired.! If you prefer a sweeter filling then add in some sugar when beating the cream cheese mixture, just remember that the Cool Whip is already sweetened. To save time make the crust up to a day in advance. You can double this and make it in a 13 x 9-inch pan, and I strongly suggest doing so, this dessert is AMAZING!