Prepare tray or mould and line it with a mixture of cling film and baking parchment.
The shape of the tray is immaterial because you will be perfecting the shape of the truffles later on.
Add butter and cream to a saucepan and allow to come to a rapid boil.
Add the boiling liquid to the chocolate and whisk rapidly.
Add in the egg yolks, and goji berries.
Pour into the prepared tin and allow to cool.
Once firm, roll the truffles into required shapes, coat in desiccated coconut then place in the refrigerator until set. Remove from the refrigerator to room temperature before serving.