Separate the egg yolks from the egg whites and save both.
Beat together the egg yolks, sugar, lemon juice or vanilla or both, in a double boiler for 10 minutes or until it thickens.
Let the mixture cool.
Beat the egg whites
Once the mixture is cool, add the beaten egg whites and the whipping cream.
Line tray with graham cracker crumbs or vanilla wafer crumbs mixed with melted butter as the crust. When grandma did this she used a 9 X 12 glass baking dish. Or purchase a pre-made crust at the store (as pictured).
Pour in mixture, you can cover lightly with more crumbs if you used that method (not as pictured) and freeze.
Serve frozen. Top with whipped cream (as pictured) or your favorite topping, if you so choose.