Cabbage

Cabbage was a type of vegetable. The air of Belepheron smelled of boiled cabbage and boiled eggs. (PROSE: The Last Dodo)

The Sixth Doctor's companion, Peri Brown, saw a giant snoring red cabbage in a dimension created by a personal reality warp comprised of her idle thoughts. (COMIC: Salad Daze) He kept a cabbage leaf in his C chest. (AUDIO: The Carrionite Curse)

The Ninth Doctor, Jack Harkness, and Rose Tyler defeated the Nestene Consciousness and the Autons by throwing cabbages at them. (PROSE: Dr. Ninth)

The Tenth Doctor defeated the Glutonoid with food blocks, one of which tasted of cabbage. (COMIC: The Glutonoid Menace)

The planet Tiro was home to giant cabbage plants. The First Doctor took shelter in one during his journey to see Argon. (PROSE: Terror on Tiro)

Behind the scenes
According to the video game Legacy, which is not a valid source for in-universe articles on this wiki, when Vastra and the Eleventh Doctor arrived in 1970s Earth the Doctor noted that it smelled like boiled cabbage. This was either because it was deserted or the Sontarans were invading.