Pickle

You may be looking for gherkin.

A pickle was a processed vegetable that Gwen Cooper ate as she found out that she was pregnant with a Nostrovite egg. She kept some in a jar in her refrigerator. (TV: Something Borrowed)

The Fourth Doctor ate a pickle while at the Gateway. (TV: Warriors' Gate)

While working late, Toshiko Sato made Owen Harper a cheese and pickle sandwich. (TV: Meat)

Rhys Williams and Lucy Sobel were served lime pickle as an appetiser at the Indian Summer. (PROSE: Slow Decay)