Process the ingredients for the base into a smooth dough and place in a springform pan. Bake for about 20 minutes at 180 ° C and allow to cool.
For the topping, bring 1/4 liter of water, lemon juice, egg and sugar to the boil. Grate and add apples and bring to the boil briefly. Stir in 1 sachet of vanilla pudding powder. Let the mixture cool down and put on the bottom. Whip 1 cup of cream until stiff and spread it all over.
Finally, sprinkle chocolate sprinkles or grated chocolate on top.