Select a big fish, then cut in two under gills and detain entrails. The fish is very fat in the flood season. The season of ca linh is the time for "bong so dua" booming - an important flavouring of the dish. It can use tamarind or lemon or ferment for the soup. Vegetable flavouring comprises eryngium, coriander, and some other spices like chilly, garlic, sugar, pure fish sauce to form tasty dish. When the water in pot is boiled, put fish into, cover the pot until the soup is boiled again, then put "bong so dua" into. Notably, it should not stir too strongly hence fish and "bong so dua"can be discomposed.
