Mackerel Loaves

Here seasoned rice is topped with silver-and-blue-streaked marinated mackerel to make an impressive luncheon or dinner main course. The fish must be salted or marinated overnight; instructions for both methods are included.

Though uncooked, the final dish keeps quite well for a day at room temperature. In fact, this mackerel loaf is the refined version of a very primitive method of food preservation, namely salting, and is probably the oldest known kind of sushi there is. It