Peel onions and slice or cut into fine rings. Clean and wash spring onions and cut them into rings. Heat 1 tablespoon of oil in a large coated pan. Fry the onions in it for about 10 minutes until transparent.
Steam spring onions, ham and marjoram briefly. Season with salt and pepper. Leave to cool. Mix quark, milk and 5 tablespoons of oil. Mix flour and baking powder. First stir about 100 g into the quark mixture, then add the Re
Roll out the curd oil dough on a floured work surface to a rectangle (approx. 26 x 34 cm). Place in a lightly greased, ovenproof dish (approx. 22 x 30 cm; approx. 2 litres capacity). Press up the edge and prick the base several times with a fork.
Mix the soured milk and eggs. Season with a little salt, pepper and nutmeg. Spread the onion mixture on the dough. Pour the egg icing evenly over the dough. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 35 minutes.
Garnish with marjoram. Possibly serve with a dollop of soured milk.