Soak the rolls in the hot milk for about 45 minutes. Sauté the onions and parsley in butter. Place the liver on the rolls, add eggs, onions and parsley, add salt, pepper and marjoram. Mix well. Let it steep for about 30 minutes. In the meantime, prepare a vegetable stock with the soup greens. Shape the mixture into dumplings. Make sure you have a bowl of water ready and moisten your hands in it before each dumpling, the dumplings will be perfect. Let the dumplings stand in the broth for about 30 minutes.