Obviously the marzipan was going to be the next hurdle, but i winged it and soaked some dried apricots in the same way as the dates (and about the same amount). Using a hand blender I processed 150-200g of whole almonds into the apricot mix. It turned out like a pale peanut butter. It tasted quite pleasant but I think next time a drop of almond essence would give it a more convincing marzipan flavour.