Peel, wash and chop the potatoes and cook in salted water for about 20 minutes. Wash herbs, shake dry. Put 2 stalks of marjoram aside. Cut chives into small rolls. Pluck the leaves from the stalks and chop finely.
Mix sour cream, quark, milk and 2/3 of the chopped herbs, season with salt, pepper and a little sugar.
Put the eggs in boiling water and boil them for about 8 minutes until soft. Drain the potatoes. Quench eggs, peel and possibly halve them. Arrange potatoes, eggs and herb sauce on plates and garnish with remaining marjoram.