Blanch the green beans in a boiling water for about 2 minutes, then drain off the water and rinse with cold water immediately. Toss with sesame oil and sesame seeds. Season with salt and pepper to taste and mix in the lemon zest
Dampen your hands with clean cold water. This is to prevent the rice sticking to your hands. Divide the rice into 8 batches. Shape each batch into an oval using your hands. Carefully wrap a strip of nori around each piece of rice, trim off any excess in length, and leave the extra sheet that is sticking out on top, then stick together at the join using a couple of crushed grains of rice and it works like wonder
Top each sushi with the seasoned green beans, dab with wasabi on top. Serve with soy sauce and pickled ginger on the side if you wish
Notes
Please refer to how to prepare the sushi rice at: http://whattocooktoday.com/how-to-cook-sushi-rice.html and how to roll the sushi at: http://whattocooktoday.com/how-to-roll-sushi.html