Mix mascarpone, quark and sugar. Whip the cream with the whisk of the hand mixer until stiff, fold in
Peel 4 small rolls from the chocolate with a peeler, chop the rest of the chocolate. Melt 25 g chocolate over a warm water bath, stir into the cream. Set aside 1 teaspoon each of the pistachios and chopped chocolate for decoration, stir in the rest
Divide the cream into 4 bowls and decorate with the remaining pistachios, chocolate rolls and chopped chocolate