Knead flour, 1 egg, oil, 120 ml water and salt to a smooth dough. Cover and let rest for about 30 minutes. Meanwhile melt 25 g butter in a hot pan. Add 25 g breadcrumbs and fry until golden brown. Take out and put aside. Peel and quarter apples and remove the core. Cut the quarter crosswise into slices.
Drizzle apples with lemon juice, mix with the largest breadcrumbs and almond slivers. Melt 50 g butter. Roll out the strudel dough on a floured tea towel (65 x 45 cm). Then pull out very thinly with floured hands or roll out with a cake roll. Spread the dough with half of the butter. Spread 50 g breadcrumbs on the dough. Add the apple mixture. Sprinkle with 50 g sugar and cinnamon. Roll up the strudel using the tea towel and press the ends lightly together. Place the strudel diagonally on a baking tray covered with baking paper and brush with remaining butter. Bake in the preheated oven (electric range: 225 °C/ convection oven: 200 °C/ gas: level 4) for 15-20 minutes on the 2nd rack from below. In the meantime, cut the vanilla pod open lengthwise and scrape out the pulp. Boil up the pod and pulp, milk and cream.
Add the apple mixture. Sprinkle with 50 g sugar and cinnamon. Roll up the strudel using the tea towel and press the ends lightly together. Place the strudel diagonally on a baking tray covered with baking paper and brush with remaining butter. Bake in the preheated oven (electric range: 225 °C/ convection oven: 200 °C/ gas: level 4) for 15-20 minutes on the 2nd rack from below. In the meantime, cut the vanilla pod open lengthwise and scrape out the pulp. Boil up the pod and pulp, milk and cream. Stir the rest of the egg, egg yolk and 75 g sugar until smooth. Whip to a firm cream on a hot water bath. Add the boiling milk-cream-vanilla mixture while stirring. Remove from the water bath, pour through a sieve and allow to cool while stirring occasionally. Remove apple strudel from the oven and decorate with apple slices. Serve with vanilla sauce
Stir the rest of the egg, egg yolk and 75 g sugar until smooth. Whip to a firm cream on a hot water bath. Add the boiling milk-cream-vanilla mixture while stirring. Remove from the water bath, pour through a sieve and allow to cool while stirring occasionally. Remove apple strudel from the oven and decorate with apple slices. Serve with vanilla sauce