My mother used to make this dish when we lived in Austria, where trout is a very common fish. It's not a fish common to Thailand, but it's sweet flavor lends itself very well to this style of soup.
Hardest part for us was going out back and catching then cleaning some farm raised Rainbow Trout otherwise the dish went together quick and fast. Tastes great and it is light yet filling. Thanks for sharing as we are always looking for more ways to prepare our trout, crawfish and freshwater shrimps :-) - 11 Aug 2017