Melt 100 g butter and cool. Mix 250 g flour and 1 pinch of salt in a bowl, make a depression in the middle. Pour egg yolk and 2 tbsp. liquid butter into the hollow. Using the dough hooks of the hand mixer, first mix from the middle, then knead everything, gradually adding approx. 1/8 l lukewarm water. Knead for approx. 2 minutes until the dough is smooth and separates from the bottom of the bowl
Continue kneading the dough with your hands for about 10 minutes on a non-floured work surface until it is soft and elastic, beating the dough several times on the work surface. Shape into a ball, spread thinly with melted butter. Place under a hot rinsed bowl. Leave to rest for at least 30 minutes
Spread a thin layer of oil on 1 piece of aluminium foil. Roast the almonds without fat. Add 50 g sugar and caramelise while stirring until golden. Then stir in 1 tbsp. butter. Spread out flat on the aluminium foil. Cool down
Peel, quarter, core and thinly slice apples. Mix with 50 g sugar, lemon juice and zest. Coarsely chop roasted almonds
Roll out the dough thinly to a rectangle (approx. 45 x 60 cm) on a large tea towel dusted with flour. Brush with some melted butter and sprinkle with breadcrumbs. Spread the apples and almonds on top, leaving about 4 cm free on the long sides and about 10 cm on the short sides. Beat the long sides slightly inwards
Roll up the strudel with the help of the cloth from the short side. Lift onto a baking tray lined with baking paper (lay diagonally if necessary). Brush with some melted butter. Bake in the preheated oven (electric cooker: 225 °C/circulating air: 200 °C/gas: level 4) for approx. 40 minutes, brushing several times with the rest of the liquid butter. Cooling down