It is prepared as an uramaki roll, a style of sushi in which the rice is on the outside.
Often the roll contains barbecued salmon skin coated in a sweet sauce.
There are many variations of this roll including barbecued salmon skin with mayo.
The Vancouver-based Japanese chef Hidekazu Tojo created the B.C.
roll in 1974 when he used salmon skin in place of the traditional anago (salt-water eel), which was difficult to obtain in the West Coast.