Vol-au-vent

A vol-au-vent was something to which the Fifth Doctor once compared the TARDIS. When on Frontios, he told a deeply suspicious and paranoid Plantagenet, "As an invasion weapon, [the TARDIS] is about as offensive as a chicken vol-au-vent." (TV: Frontios)

Behind the scenes
Though unremarked in Frontios a vol-au-vent is a kind of puff pastry with a chicken filling — in a sense, a continental version of a Cornish pasty.