Mix the low-fat quark with the juice from the two oranges and sugar until creamy, add a little milk if necessary or stir in half a cup of whipped cream and season to taste.
Peel 6 mandarins and carefully remove the white skin. When this is done, cut in half, cut into thin slices and layer alternately tangerines and curd in dessert bowls.
Peel and slice the last tangerine and use it to garnish the dessert.