Take an umeboshi plum and chop it into little pieces
distributed through the rice. Lay some of this rice
out on a piece of sushi nori (thats nori sheets that
have been roasted), and roll it up closing the ends.
Do this while the rice is still warm and it sticks
together perfectly. When you bite a piece off, the
seaweed wrapper closes itself with help from your
teeth so the rice doesnt fall out.