In a large bowl, mix the ice cream with the nuts and cherries. Transfer into cake silicon rubber mould, and smooth over the top.
Transfer to the freezer for 4 hours or overnight until needed.
For the ganache topping, break the chocolate into pieces and place in a heatproof bowl over a pan of simmering water to melt.
Once melted remove from heat and stir in the cream.
Leave to cool slightly.
To serve, remove the frozen ice-cream cake from freezer.
Invert on a serving platter and carefully peel off the silicon mould.
Smooth any imperfections with a spatula or palette knife.
Pour the chocolate ganache on top of the cake and spread to cover leaving a thin rim around the edge to show the ice-cream cake underneath.
Sprinkle the nuts over the top.
Top with cherries serve immediately cutting into slices.