Eating Sashimi, or raw fish, with traditional sauces disappeared when shoyu became popular in the 17th century. The use of sauces returned with the western-inspired salad.
Ingredients
ice cubes
400g/14oz very fresh thick turbot, skinned and filleted
First make the dressing. Roughly tear the rocket leaves and process with the cucumber and rice vinegar in a food processor or blender. Pour into a small bowl and add the rest of the dressing ingredients, except for the wasabi. Check the seasoning and add more salt, if required. Chill until needed.