Soak rolls in cold water. Grate cheese. Wash parsley, dab dry and chop. Knead the fat, squeezed out roll, cheese, parsley and egg yolk. Wash the meat, dab dry, spread with the minced meat mixture and roll up.
Tie together with kitchen string. Rub the roast with salt and pepper. Melt 20 g fat, stir in ketchup and marjoram. Spread the roast with it and sprinkle almonds over it. Place the roast on the cold rinsed fat pan of the oven and roast in the preheated oven (electric cooker: 200 °C/ gas: level 3) for approx. 1 1/2 hours.
In between, gradually pour on 1/4 litre of water. In the meantime, clean the savoy cabbage and remove the stalk. Cut cabbage into strips and wash. Sauté in the remaining fat, add stock and caraway and braise for about 25 minutes.
Season with salt and pepper. Peel and wash the potatoes and cook in salted water for about 20 minutes. Remove roast from the fat pan. Pour frying stock through a sieve and bring to the boil. Stir flour and some cold water until smooth, add to the sauce and bring to the boil again.
Let simmer at low heat for about 5 minutes and stir in sour cream. Season sauce with salt and pepper. Drain the potatoes. Arrange roast, cabbage and potatoes on a plate, serve sauce extra.