Heat the cream in a saucepan and remove from the heat. Break the chocolate into pieces, add to the hot cream and melt in it while stirring. Pour into a bowl and put in a cool place overnight.
Mix cornflour and 2-3 tablespoons of cherry nectar. Bring the remaining juice, sugar and half of the frozen raspberries to the boil in a pot. Add cornflour while stirring and bring to the boil again briefly.
Let the sauce cool. Defrost remaining raspberries. Spread the raspberry sauce on plates. Whisk the truffle mixture with the whisks of the hand mixer to a firm cream. Pour into a piping bag with a large star-shaped spout and squirt a thick tuff into each meringue tart.
Spread on the plates and decorate with remaining raspberries and mint. Serve dusted with icing sugar.