Phathun root in Thinleygang.
Phathun is a wild tuber plant, the root of which is said to resemble a horse's leg. It was once a common food in Bhutanese cuisine. It takes around two weeks to rid the root of its natural poison and make it edible. After being collected from the wild, one needs to peel its skin and hairs, chop it into small pieces and dry it for a week. The root must be soaked in water for an additional week,
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