Chestnut
From Tardis Wiki, the free Doctor Who reference
Chestnuts were a consumable nut sold by street sellers who roasted them on the streets. They were sold by a a seller just above the stairs to the 1814 frost fair. (TV: Thin Ice [+]Loading...["Thin Ice (TV story)"]) They were also sold in London in 1851. (TV: The Next Doctor [+]Loading...["The Next Doctor (TV story)"]})