To MakePrepare the rice and the avocado as instructed. For the avocado, slowly peel off the skin and then use the lemon juice to prevent the flesh from browning before slicing in to thin strips. To form the sushi, roll a small amount of the rice in to small roll. Place a couple slices of the avocado on to the top of the rice and then wrap with a strip of the seaweed. Wet the ends of the seaweed to help them to stick together.