Hazelnuts can be found in the wooded areas of Rhynie and can be picked and roasted for pestos, or perhaps to make your own chocolate hazelnut spread.  Evidence of hazelnut processing on Colonsay has been radio carbon dated to the Mesolithic. Historically, a type of hazelmead has been mentioned in early Irish literature, and reports of a potent hazel brew was known for having psychotropic effects on those who drank it…but maybe they were just nuts.