Salmon collar and strips of belly are simmered with semi-ripe papaya and moringa leaves in a broth flavored with shallots, lemongrass, galangal, garlic and fish sauce.
Lemongrass, ginger, scallions, garlic and tomatoes are sauteed to make the base for the broth. Lime juice is stirred in towards the end of cooking time.
Inspired by canh chua, Vietnamese sweet and sour soup, the flavor of the broth comes from the combination of sour tamarind juice and chunks of sweet ripe pineapple.