Place biscuits into a plastic bag and beat with a rolling pin until broken into small pieces
Add chocolate to a Bain Marie (heat proof bowl over simmering water) and melt until smooth
Add vegan butter and golden syrup and stir until melted and smooth
Add broken biscuits, pistachios, almonds, raisins, and orange zest to a large bowl and pour melted chocolate mixture over - mix until well combined
Place mixture on cling film and roll each side around it to resemble a salami or log shape
Tie each end and refrigerate for around 3 hours until completely solid
Remove cling film and coat generously with icing sugar to resemble a salami
Leave at room temperature for a few minutes before serving
