Peel the apples, cut them in half and remove the core, cut the pulp into leaves and mix with 55 g sugar, vanilla sugar, raisins, nuts and the juice and zest of the lemon. Melt the butter, stir in the breadcrumbs, cinnamon and 1 tablespoon sugar and roast until the breadcrumbs are golden brown. Mix half of it with the apples.
Preheat the oven to 200 °. Sprinkle the middle third of the rolled out puff pastry with the remaining breadcrumbs. Spread the filling on top and roll up the strudel. Place the seams down on a tray and brush with egg. Cut across the surface with a sharp knife at regular intervals. Bake the strudel until golden in about 50 minutes. If necessary, reduce the heat to 180 ° after 30 minutes.