Fish finger
Fish fingers were a type of human food. They were made from fish cut into rectangles, covered in breadcrumbs, then heated up. Not long after regenerating, the Eleventh Doctor found some frozen fish fingers in Amelia Pond's kitchen, along with some custard. He decided to eat them together as fish custard. (TV: The Eleventh Hour)
Later, the Doctor compared House's penchant for eating TARDISes to enjoying processed food like fish fingers. The Doctor's TARDIS, temporarily in human form, expressed puzzlement about what fish fingers were ("Do fish have fingers?"). (TV: The Doctor's Wife)
A faction of Ice Warriors developed a taste for frozen fish fingers, which were the closest thing to their natural diet, during a period of exile on Earth. (AUDIO: Thin Ice)
Behind the scenes
In The Eleventh Hour the fish fingers dunked in custard that Matt Smith ate were actually coconut breaded fish-finger shaped cakes. (COMIC: DWA 161)
