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)

Cheese was the currency on Dryra, inhabited by Dryrth, a species which strongly resembled Earth cows. (COMIC: The Lunar Strangers)

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, Rosemary 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)

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

Cheese and onion was a flavour of crisps. (PROSE: Citation Needed)

A bus in Montgomery in 1955 had advertisements for cottage cheese. (TV: Rosa)

Cheese types
There were various types of cheese. These included cheddar, (PROSE: Bay of the Dead) Cheshire, (PROSE: Slow Decay), Gruyère, (TV: The Space Pirates) Gorgonzola, (TV: Day of the Daleks) Swiss (TV: End of the Road) and Wensleydale. (PROSE: Slow Decay)

Cheese dishes
Cheese could be eaten alone, (TV: Day of the Daleks) or used as an ingredient, such as in lasagne. (PROSE: Stop, Thief!)

It could also be used in sandwiches, including cheese sandwiches (TV: The Sea Devils) cheese and pickle sandwiches (TV: Meat) and cheese and tomato sandwiches. (TV: End of the Road) It could also be used to make cheese on toast. (PROSE: Bay of the Dead) It could be used in burgers, such as cheeseburgers, (PROSE: The Ruins of Heaven) and a Kronkburger could sometimes be served with cheese. (TV: The Long Game)

Cheese was a common topping on a pizza. (TV: The Parting of the Ways, Love & Monsters, Meat)

A cheese dip could be served alongside other dishes, including hazzlefrip plebemas. (COMIC: Midnight Feast')

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)

Other references
Jack Harkness was often described as "cheesy". (TV: Boom Town et al.) According to Jack, "cheesy" was early 21st century slang. When asked, Mickey Smith reaffirmed that it was bad. (TV: Boom Town) Nina Rogers decribed Jack as having a "cheesy grin" and gave him the nickname Captain Cheese. (PROSE: Risk Assessment) Ryan Sinclair later described Jack as being "kind of cheesy", with Yasmin Khan adding that it was a "good cheesy". (TV: Fugitive of the Judoon)

Luke Smith often used "milky" instead, much to Clyde Langer's annoyance. (TV: Secrets of the Stars)