. . "ring agent can be tamarind, guava, green sour mango, local small lime called calamansi (or limau kasturi in Malay) or a sour fruit called camias (or belimbing in Malay) , with lots of vegetables, meat or fish including using pork, ribs, chicken and any seafood.Here is my version, very simple recipe, low fat and tasty, worth a try:Ingredients: (makes 2 large soup bowls)3 cups of fish stock or chick" . . .