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Chestnuts are a common winter snack here in Rome. Vendors set up a mobile brazier and heat them up to expose the white nut within. They are then served within a paper rolled cone, you can find these vendors on almost every street.
I recently discovered that chestnuts were always a Roman snack reaching back to the Republic where chestnuts were eaten plain or used in porridge. In fact the Romans then brought Chestnuts with them to the Northern Territories, introducing the tree to England, where it then became very popular in landscaping.