For each sandwich, spread a scoop of neapolitan ice cream on a thin slice of pound cake, then top with another slice of cake. Smooth the edges so the ice cream is flush with the cake. Place on a plate and pour 2 tablespoons melted dark chocolate on top, letting it drip down the sides. Freeze until hard. Top with whipped cream and chopped pistachios.
Photograph by Antonis Achilleos