This bitter-sweet, citrusy berry looks like a mini orange, originates in Asia and can be used in both sweet and savoury dishes. Eat them whole (as they’re difficult to peel) and watch out for the pips! They’re very bitter.
Historically grown in China and Japan, they first appeared in Britain in the mid-19th century and have been a bit of a curiosity ever since. And try saying ‘kumquat’ without smiling…