Place the curd on a damp tea towel and leave to drain in a sieve for about 4 hours, preferably overnight. Rinse raisins, dab dry, cover with orange juice and leave to soak for approx. 2 hours. Melt 50 g butter. Knead flour, 125 ml lukewarm water, melted butter and salt with the dough hooks of the hand mixer. Work through the dough with your hands and beat it on the tabletop until it is smooth. Brush with the oil and cover with a hot rinsed bowl. Leave to rest for about 30 minutes.
Drain the raisins and squeeze a little. Wash the orange and lemon hot, rub dry and grate the peel. Cut open the vanilla pod and scrape out the pulp. Melt 25 g butter. Mix sugar, vanilla pulp and eggs. Stir in quark, raisins, lemon and orange peel. Roll out the strudel dough on a floured tea towel very thinly to a rectangle (approx. 30 x 40 cm). Melt 125 g butter. Brush the dough with part of the butter and sprinkle with breadcrumbs. Pour the curd mixture onto a narrow side, leaving a rim of approx. 2 cm wide. Fold over the long sides towards the middle by 1-1.5 cm each. Spread with butter. Fold over the narrow side with the quark mixture and spread with butter.
Roll out the strudel dough on a floured tea towel very thinly to a rectangle (approx. 30 x 40 cm). Melt 125 g butter. Brush the dough with part of the butter and sprinkle with breadcrumbs. Pour the curd mixture onto a narrow side, leaving a rim of approx. 2 cm wide. Fold over the long sides towards the middle by 1-1.5 cm each. Spread with butter. Fold over the narrow side with the quark mixture and spread with butter. From the narrow side roll up with the quark to a strudel. Cut the top of the roll of dough diagonally 5-6 times and place it on a baking tray lined with baking paper. Brush the strudel with some butter. Bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-50 minutes until golden brown. Brush with remaining butter from time to time. Let the strudel cool down a little and dust with icing sugar
From the narrow side roll up with the quark to a strudel. Cut the top of the roll of dough diagonally 5-6 times and place it on a baking tray lined with baking paper. Brush the strudel with some butter. Bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-50 minutes until golden brown. Brush with remaining butter from time to time. Let the strudel cool down a little and dust with icing sugar
3 3/4 hours waiting time