01 - In a mixing bowl, combine the quark, powdered sugar, lemon zest, and vanilla extract. Mix until smooth and well combined.
02 - In a separate bowl, whip the heavy cream until soft peaks form.
03 - Gently fold the whipped cream into the quark mixture until fully incorporated.
04 - Divide the mousse into serving glasses and chill in the refrigerator for at least 2 hours. Before serving, top with fresh red currants.