Sashimi with nori salt, avocado and ginger

1.For nori salt, finely chop one half of the nori, then combine with dashi powder and 2 tsp sea salt flakes in a mortar and finely crush to a powder with a pestle. Fold remaining nori in half lengthways and cut into strips with scissors.

2.For ginger vinaigrette, whisk ingredients in a small bowl and season to taste.

3.Arrange fish and avocado slices on plates, season with a pinch of nori salt and a little ginger vinaigrette. Add radish, drizzle with more vinaigrette and season with more nori salt. Scatter with nori strips and fennel fronds to serve.