Place the curd in a sieve lined with a clean kitchen towel and leave to drain overnight in the refrigerator
Wash the sultanas, drain them. Drizzle with rum. Roast the almonds, let them cool down. Take the dough out of the fridge
Cream 75 g butter, 75 g sugar, 1 pinch of salt, 1 vanillin sugar and lemon zest. Stir in eggs, quark, sour cream and whipped cream one after the other. Stir in sultanas and 4 tbsp. almonds
Melt 50 g butter. Unfold dough. Place 1 sheet of dough on a clean tea towel and brush with some butter. Place the remaining sheets alternately lengthwise and crosswise on top, brushing each with butter
Spread the mixture on top, leaving 2 cm free at the edge. Beat the edges just above the filling. Roll up the strudel with a cloth and place on a baking tray lined with baking paper. Spread with the rest of the butter and sprinkle with 1 tablespoon of sugar.
Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 25-35 minutes. Sprinkle the rest with almonds and icing sugar