Classic Miso-Marinated Salmon with Green Sauce

Saikyo miso, sweet white miso, is made in Kyoto Prefecture. Kyoto was the capital of Japan for a thousand years. The technique of marinating fish in miso was born out of necessity, because, unlike other major cities such as Tokyo, Kobe, and Osaka, Kyoto is situated inland. Marinating fish in miso was a method of preserving fresh-caught fish for the long journey from the fishing port to the capital. Today, we marinate fish not to preserve it, but rather to enjoy the sweet flavor that the fis