Cut the salmon and cucumber into similar-sized strips. The book recommends 1/2 cm strips but I found the fish too soft to hold such a small piece so they were closer to 1 – 1.5cm. I don’t think it matters too much.
In a small bowl mix the miso paste, mirin, soya sauce, vinegar and oil with the sugar and whisk until it is well combined. Add the pickled ginger and spring onions and gently toss the salmon and cucumber through the dressing.
Arrange small piles on plates and sprinkle the sesame seeds and micro leaves on top.
Notes
This can be made just before assembling and takes about 10 minutes. You could prep the fish and the cucumber and the dressing before.