Sushi squares

Method

1. Put the rice in a medium saucepan, cover with 660ml cold water and place over a medium heat. Cover, bring to the boil, reduce the heat and simmer for 10 minutes. Remove from the heat and set aside, covered, for 15 minutes.
2. Uncover the sticky rice and add the soy sauce and rice vinegar. Stir it all together for a few minutes to cool slightly. Mix in the cucumber and ginger, season to taste and set aside.
3. Lay 2 seaweed sheets, slightly overlapping, in a small baking tray with sides, about 37cm x 19cm. Using damp hands, spread the rice onto the seaweed, pressing down into a flat layer – keep your hands damp so the rice doesn’t stick to them. Top with the remaining seaweed, cover with cling film and weigh down with a book. Chill for 1 hour or overnight.
4. Upturn the sushi onto a chopping board. Trim off and discard the edges. Cut into 64 squares. Put on serving plates and top each with a small blob of wasabi. Garnish the plates with spring onion flowers, if you like.