Chocolate and Pistachio Cream Cake

Name: Chocolate and Pistachio Cream Cake
Prep time: 20 min
Cook time: 25 h 20 min
Total time: 25 h 20 min
Yield: 12 pieces
Ingredients: 4 gelatine leaves; 175 g water; 220 g icing sugar; 125 g whipping cream; 75 g cocoa powder, unsweetened; 125 g dark chocolate (70% cocoa solids); 110 g unsalted butter; 125 g sugar; 3 eggs; 1 pinch salt; 75 g plain flour; 100 g pistachio nuts, unsalted, shelled; 15 g agar-agar; 100 g sugar; 300 g milk; 100 g pistachio paste; 4 egg yolks; 200 g whipping cream; 25 g pistachio nuts, unsalted, shelled