Tuhau is a type of wild ginger, native to the jungles of Sabah-Borneo, and it is used to make the dish of the same name. The dish slightly resembles a relish, in that it is both a condiment - most often accompanying fish - and a food on its own.
Tuhau ginger is finely chopped and served with lime juice or vinegar (for acidity), diced chilis, diced garlic, and salt. It is immensely popular in the Sabah region of Malaysia, where it is available all year long in most markets. Another way to serve tuhau is in its pickled form (which intensifies the tart, savory flavor), and it is then usually eaten with white rice.