The liver is cleared of membranes and blood vessels, cut into strips and add some flour in. Salo is cut into cubes and fry until it turns rosy. Add the liver and fry until they turn light brown, then remove to a warm plate. In fat put chopped onion and fry until svetlozlatisto coloring, then put on roasted liver. In fat fry gently 1-2 tbsp flour, then add a little fuzzy in cold water tomato paste, a pinch of salt and a pinch of sugar (optional). Boil the sauce and after 4-5 minutes, remove from plate, thicken with cream and pour over the liver. Pre-cooked potatoes, cut into chunks and fry in the butter, scatter with a mixture of crushed caraway seeds and salt in the chopped parsley and add to the aliquoted liver.