Place the defrosted puff pastry on a baking sheet lined with baking paper and prick a few times with a fork, bake in the preheated oven for 8-10 minutes.
In the meantime, peel the apples, finely chop them and mix with 2 tablespoons of sugar, cinnamon and raisins.
For the sponge cake, stir the eggs with 90 g sugar, lemon zest and water until very frothy, about 2 minutes. Then fold in the flour slightly.
Take out the baking sheet with the puff pastry, quickly spread the apples on it and spread the sponge cake over it. Bake ready in 10-12 minutes.
Mix a glaze from lemon juice and powdered sugar and coat the cooled cake with it.