Wash the potatoes and cook in boiling water for about 20 minutes. Clean, wash and finely dice the peppers. Wash chives and parsley, dab dry. Cut chives into fine rolls.
Finely chop the parsley, except for something to garnish. Cut cress from the bed. Mix quark, olive oil, paprika cubes (except for 2 tablespoons for garnishing) and herbs (except for some cress).
Season with salt, pepper and sugar. Drain potatoes, rinse and peel. Arrange potatoes and quark on plates. Serve garnished with remaining paprika cubes, parsley and cress.