Coarsely chop the couverture and melt it together with nougat and butter in a hot water bath (not too hot!) while stirring. First stir in the gingerbread spice, then add the hazelnuts, almonds and pistachios. Line a form (22 x 20 cm) with baking paper. Pour in nut chocolate and spread it with a tablespoon in a wavy shape. Leave to set in a cool place (no fridge!).
Remove the chocolate from the mould and remove the baking parchment. Cut chocolate into cubes and sprinkle with coarsely ground pistachios. Store in a cool place. Makes 25-30 pieces