Put your ice cream maker bowl in the freezer and make sure it is fully frozen before proceeding with the recipe unless you are leaving the nuts to soak overnight.
Place the pistachio nuts in a large bowl with enough luke warm water to cover it and soak overnight or for several hours.
Place the pistachio nuts, coconut sugar and coconut milk into a blender and blitz into a smooth consistency.
If you don't own a high speed blender (i.e vitamix , Ninja or blend tech), you may need to strain the liquid in a cheesecloth or through a sieve to eliminate any grittyness.
Pour the liquid into a bowl and stir in the coconut solids (or thicker part of a can of chilled coconut milk)
Set aside and refrigerate overnight or 2-3 hours if you can't wait and want to fast track things.
Set up your ice cream maker with the frozen bowl etc...
Switch on the machine and slowly pour in the liquid contents then allow it to churn into soft ice cream (the time it takes depends on the model).
Pour the soft ice cream into a ice cream container (I lined mine with parchment paper to omit freezer burn)
Leave to set in the freezer for 1-2 hours before serving.