This fish simmered in miso is seasoned with a rich miso flavor. The trick is to first simmer the fish without the miso, then later to simmer it in the miso!
The sauce will thicken once it cools, so take that into consideration while preparing the sauce.
If you overcook the fish, the flavor will be compromised, so be careful.I recommend using a shallow pot or frying pan.
Enjoy Japanese food around the world.