Wash untreated orange, rub dry, peel thinly and cut into fine strips. Put aside for decoration. Peel the peel of all oranges generously so that the white skin is completely removed.
Cut oranges into slices. Arrange as circles on 4 dessert plates. Sprinkle each with 1 teaspoon of orange liqueur. Leave to steep for about 10 minutes. Meanwhile drain the cranberries. Collect the juice.
Stir the quark and cream until smooth. Season to taste with cranberry juice and sugar. Pour in portions on the marinated orange slices and sprinkle with cranberries. Decorate with lemon balm and orange peel strips.