Roughly chop the onion. Quickly fry the chopped liver in hot olive oil in a pan, season with salt, pepper, season with new spices, remove from the pan and keep warm. Fry the onion until golden yellow in the frying residue and dust with flour, pour 1/4 l soup on top, bring to the boil and season with salt, pepper and marjoram to taste. Add the liver and let it steep for a short time. Finished!