Cheese

Cheese was a type of dairy product that was made mostly from milk. Cheese could come in many different shapes and flavours and was used as an ingredient in many foods.

Cheese apparently existed on Alzarius, but not on the nearby "vampire planet" also in E-Space. (TV: State of Decay)

While hiding in the Doctor's TARDIS, Klov Dreb Fotch Passameer Day Slitheen III stole, among other food, cheese sandwiches. (COMIC: Who Ate All the Biscuits?)

Rats were associated with cheese. While using a newsreader as a mouthpiece, Miss Kizlet remarked that her human prey homed in on Wi-Fi like rats sniffing cheese. (TV: The Bells of Saint John)

During the Feast of Omega, a Fortean Flicker turned all the candles into soft cheese. There was a smell of burning dairy products everywhere. (PROSE: Happy Endings)

The Dryrth used cheese as a currency. (COMIC: The Lunar Strangers)

Lake 2 was allergic to cheese, unlike his previous incarnation. (AUDIO: The Lady in the Lake)

The Doctor
The Eleventh Doctor claimed to have a doctorate in cheesemaking, albeit "only the stinky, blue kind". (TV: The God Complex, PROSE: Shroud of Sorrow)

The Third Doctor ate a plate full of cheese sandwiches intended for Jo Grant, leaving her with only the lettuce garnish. (TV: The Sea Devils)

The Third Doctor ate gorgonzola while at Auderly House and encouraged Jo Grant to do likewise. (TV: Day of the Daleks)

The Eleventh Doctor used cheese when making himself and Craig Owens an omelette. Craig remarked that it was the most enjoyable thing he had ever tasted. (TV: The Lodger)

The Doctor's TARDIS contained a cheese factory. (COMIC: The Adventures of Strax & the Time Shark)