Separate the egg. Whip the egg yolks, sugar and vanilla sugar until frothy. Fold in the quark and orange juice. Beat the egg white until stiff and fold into the cream.
Set aside 4 panicles of the currants. Strip the rest of the stalks and place in 4 bowls. Spread the cream on top (preferably with a piping bag). Garnish with the currant panicles, hazelnut brittle and lemon balm leaves.