Puree the raspberries with the powdered sugar, then pass through a sieve and refrigerate.
Rub the peel of the lime and mix with the quark with 5 tablespoons of egg liqueur. Whip the cream with 1 tablespoon of sugar until stiff and fold it into the quark.
Layer the raspberry purée and quark alternately in four glasses, top with the remaining egg liqueur.