Wash the chicken fillets and pat them dry. Mix liverwurst and cognac and season with some marjoram. Cut a pocket into each fillet and fill with the refined liver sausage. Fix with wooden sticks. Peel, wash and finely dice the carrot. Peel and chop the onion.
Clean the savoy cabbage, quarter it and remove the stalk. Wash cabbage and cut into strips. Heat oil in a pan. Brown the fillets in it all around. Season with salt and pepper. Fry for about 15 minutes at medium heat until done. Heat the fat in a saucepan. Heat carrot, onion and cabbage in it. Deglaze with stock and cream, bring to the boil and cook for about 10 minutes. Stir in sauce thickener and bring to the boil. Season with salt and pepper. Fry the roast dough by the spoonful in hot lard while turning it golden brown.
Heat the fat in a saucepan. Heat carrot, onion and cabbage in it. Deglaze with stock and cream, bring to the boil and cook for about 10 minutes. Stir in sauce thickener and bring to the boil. Season with salt and pepper. Fry the roast dough by the spoonful in hot lard while turning it golden brown. Sprinkle fillets with coarse pepper and arrange on plates with savoy cabbage and rösti. Serve garnished with marjoram