Fish Alternatives If you can find sablefish--a rich, succulent fish also called black cod, though it's very different from regular cod--by all means use it. Other alternatives are bluefish or mackerel fillets, but don't turn them during cooking or they may fall apart.
In Place of Mirin: This is one case where the substitute really is just as good as the original ingredient. In fact, in our taste tests we could barely tell the difference between this recipe prepared with mirin (sweet Asian cooking wine) and with sweet sherry. You can also use six tablespoons dry sherry and add an additional three tablespoons sugar.
Soy sauce is notoriously tough to pair with wine, which is one reason beer is so often served with Japanese food. A moderately priced sparkling wine from California is another possibility. This will stand up to the soy sauce and cut through the richness of the salmon.