Mix flour, starch, locust bean gum and press a depression in the middle. Crumble yeast into it. Add 1 tablespoon of sugar and 4 tablespoons of warm milk, mix with some of the flour. Cover and leave to rise for about 15 minutes.
Bring 150 ml milk and 1 tablespoon sugar to the boil. Stir in poppy seeds, bring to the boil. Swell for about 20 minutes. Chop apricots, add. Cool down
Add the egg, 50 g butter, quark, 50 g sugar, 75 ml milk to the pre-dough and knead. Leave to rise for about 1 hour
Fold the aluminium foil several times, so that a strip approx. 5 x 70 cm wide is created. Knead the dough. Spread on baking paper to form a rectangle (approx. 30 x 40 cm). Spread the filling over it. Use the paper to form a stollen and wrap the aluminium strip around it. Bake in a hot oven (electric cooker: 200 °C/ convection oven: 175 °C/gas: level 3) for about 25 minutes. Brush with 50 g butter while hot, dust with icing sugar