Mix flour, eggs, milk and 1 pinch of salt to a smooth dough. Leave to swell for approx. 30 minutes
Peel and chop the onions. Sauté in 1 tbsp. hot oil. Add sauerkraut and steam for about 10 minutes. Season to taste with salt, pepper and sweet paprika
Heat 1 tablespoon of oil in a coated frying pan (26 cm Ø). Bake 4 thin pancakes one after the other from the dough. Cover each pancake with 2 slices of ham, spread the sauerkraut on top and roll up
Cut the rolls into approx. 5 cm thick slices. Place them in a greased casserole dish with the cut surface facing upwards, close together. Bring a good 200 ml of water to the boil, stir in the stock. Mix with sour cream and pour over the rolls. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 25-30 minutes. Garnish with parsley if desired.