Drain the apricots and puree, except for 4 halves for decoration. Drizzle with liqueur and divide into 4 glasses.
Mix the quark, sugar and orange juice together. Whip the cream until stiff and fold into the quark. Spread the quark cream on the puree. Decorate with the remaining apricot halves and orange biscuits.
You can use orange flavor instead of apricot liqueur, but only a few drops. I also like to use lemon flavoring as well.