Sausage

A sausage was a food made of meat, generally associated with the planet Earth.

Throughout his life, the Doctor occasionally mentioned sausage, usually in a metaphorical way. The Tenth Doctor once described a hot dog, a kind of sausage, as "the Cyberman of food". (DW: The Age of Steel) Consequent to his regeneration, the Tenth Doctor said he would take Rose Tyler home, where she could enjoy sausages and mash, along with fish and chips, beans on toast, turkey and nut loaf. (DW: Children in Need Special) At an earlier point in his life, the Sixth Doctor knew an amusing anecdote involving a sausage, which he once recounted to a convocation of lexicologists from the Articulate Worlds (BFA: ...ish). Whilst in the Land of Fiction, the Second Doctor said that, were the Master of the Land's plans to go through, "Mankind would be like a string of sausages, all the same!" (DW: The Mind Robber)

Professor Amelia Rumford was fond of sausage sandwiches, believing that eating them helped one think. (DW: The Stones of Blood)
 * In the real world, sausages consist of ground meat and other animal parts, herbs and spices, and possibly other ingredients, generally packed in a casing (traditionally the intestines of the animal), and preserved in some way.