One trick I like to use for serving is this. It's completely optional, but it makes life easier! Before assembling, line the inside of the dish with plastic wrap. Press & Seal works well. Assemble the dessert as directed, but don't add the whipped cream. When it it completely frozen, grasp plastic wrap and lift from dish. Set the dessert on a cutting board and use a chefs knife to cut into squares (or rectangles) or however many servings you want. Fit the cut pieces back in the dish, then top with whipped topping and either return to freezer until ready to serve or serve right away. The pieces will be scored and cut, so you can lift them right out of the pan with a pie spatula.