Gently warm 100 ml water and 8 tablespoons of milk. Dissolve yeast in it. Mix 1/2 tsp salt and flour. Knead with oil and yeast milk until smooth. Cover and leave to rise in a warm place for about 30 minutes
Peel and chop the onions. Heat the fat. Steam onions until translucent. Wash and chop parsley. Dice bacon or cut into thin slices
Finely grate the potatoes. Mix with egg, quark, sour cream, onions and parsley. Add a little milk until you have a smooth mixture. Season with salt and caraway seeds
Knead the dough. Roll out on a greased tray (35 x 40 cm). First spread potato mixture, then bacon on top. Bake in a hot oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for 45-50 minutes