Ingredient: Bilimbi, sour - Belimbing wuluh

This pale green acidic fruit about 5-8 cm (2-3 inch) long, grows in clusters on a tree. A relative of the large, five-edged sweet starfruit, Bilimbi is used whole or sliced to give a sour tang to some soups, fish dishes and sambals.

Sour grapefruit or tamarind juice can be used as subtitute.