Burger

A burger was a sandwich containing a meat patty (traditionally beef), in a bun. Burgers and sausages were traditional barbecue foods. (TV: The Power of Three)

Frobisher once took on the form of a burger after falling into a bin. A homeless man found him in the bin, assumed he was a normal burger, and bit him. (COMIC: The Shape Shifter)

While eating a salad dinner aboard the Doctor's TARDIS, Peri Brown found herself in a dimension modelled on a combination of the book she had been reading and the salad she had been eating. After a frightening experience in that world which nearly saw her executed for the crime of eating vegetables, Peri decided to prepare burgers and chips instead. (COMIC: Salad Daze) The Sixth Doctor bought a burger while waiting for repairs to his TARDIS to be completed. He ate next to Kane, who displayed his telekinetic abilities on the burger. (COMIC: Kane's Story)

Amy Pond and Rory Williams hosted an anniversary barbecue where they served burgers and sausages. (TV: The Power of Three)

Types of burgers
Big Macs were the name of a burger available at the fast food chain McDonald's. Burger King was another popular fast food chain that served mainly burgers.

Kronkburgers were a popular food in the far future. (TV: The Long Game; PROSE: Judgement of the Judoon, The Resurrection Casket, The Last Dodo; COMIC: The Iron Legion)