Dice the nougat. Melt with milk in a hot water bath. Pour into a bowl and let it cool down for about 15 minutes.
Chop the pistachios. Whip the cream until stiff. First stir 3 tbsp. cream into the nougat mixture, then fold in the rest of the cream and 2⁄3 pistachios. Pour cream into four glasses. Sprinkle with the rest of the pistachios. Chill for at least 2 hours. Decorate with cocoa and marzipan chocolate hearts.
Roll out 200 g of marzipan paste onto some icing sugar to a thickness of about 1 cm. Cut out approx. 6 small (approx. 4 cm Ø) and approx. 6 large (approx. 6 cm Ø) hearts. Knead the marzipan sections again and again and roll them out again.
Chop 100 g dark chocolate coating and melt in a hot water bath with 10 g coconut oil (e.g. palmine). Dip marzipan hearts partially or completely into the mixture as desired, place on a cake rack.
Sprinkle with 2 tsp. chopped pistachios and leave to dry in a cool place. Spread the rest of the couverture in strips on the Mozart cream if necessary.