Chop the onion, cut the liver into strips, cut the zucchini unpeeled into 1cm thick slices.
Heat the oil in a coated pan and brown the onion, then add the liver and roast it well, first season with salt and pepper - remove from the pan and place on a warm plate - season the zucchini slices with salt, pepper and season with marjoram and place in the pan on both sides sauté (goes very quickly), remove and also put on a warm plate - stir the cream and soy sauce into the roast residue and bring to the boil once, then remove from the hotplate - add the liver to the sauce and mix it, if necessary, add some seasoning - then add Serve the zucchini slices - a garlic baguette goes great with it