Misoyaki, litterally "charred miso" is a typical Hawaiian preparation for butterfish. The glaze works well with any richly flavored fish, in fact, the higher in fat the fish, the better. Halibut and black cod can also be substituted for the salmon in this recipe. Miso, fermented soybean paste, is an important foundation of Japanese cuisine, and it comes in several different colors depending on the type of bean and length of the fermentation period. White miso is milder in flavor and less salty than other types and works best in this recipe. The salmon turns out very tender, delicious and full of flavor. Serve with jasmine rice and sauteed japenese vegetables.