A cheeseburger was a food item.
The angel Yy traded his wings for a cheeseburger. (PROSE: The Ruins of Heaven)
Rose Tyler once tried an apple that had been genetically engineered to taste like a cheeseburger, but thought it was awful. (COMIC: Down the Rabbit Hole)
A friend of Toshiko Sato once caught hepatitis from a burger from an out-of-the-way burger stand. Tosh worried she might get the same, and so refused to eat cheeseburgers when her Torchwood team visited one such place. (TV: Countrycide)
In a café in Cardiff Bay, Brent Hayden ordered a cheeseburger with extra bacon, chips, onion rings and barbecue sauce. (AUDIO: The Man Who Destroyed Torchwood)