Japanese short-grain rice that is steamed with umeboshi (Japanese pickled plums), then tossed with chopped, fresh shiso leaves and toasted white sesame seeds. This rice is simple, but absolutely delicious.
Rinse the rice: Put the rice into a large mixing bowl and set it in the sink. Run cold water into the bowl, and with your hand, gently swish the rice around, and then carefully drain the water into the sink, without losing any of the grains of rice (it's ok if all of the water isn't completely drained). Repeat this until the water runs clear enough that you can count individual grains of rice, about 3 to 5 times. Drain the rice well after the final rinsing.
If cooking in a rice cooker: Put the rinsed, drained rice and the cooking water in the pot of the rice cooker, then place the umeboshi on top of the rice. Follow the instructions for your rice cooker to cook regular rice. After the rice cooker has finished its cooking cycle, allow the rice to sit and steam for 10 to 20 minutes. When it has finished steaming, open the lid. Remove the umeboshi, then gently cut and fold the rice with a flat rice paddle or spatula, bringing the rice up from the bottom to the top to release excess steam. Do not stir or mix forcefully, as this will break grains of rice and the texture can become mushy.
If cooking on the stove: Combine the rinsed, drained rice and the cooking water in a medium saucepan. Cover with a lid (it's best if it's see-through) and set it aside to soak for 20 minutes--the rice will become more opaque and plump.
After soaking, remove the lid and place the umeboshi on top of the rice, then replace the lid and put the pot over high heat. Bring the water to a boil (listen/watch for the lid to start jiggling), then reduce the heat to low and cook until the liquid is completely absorbed, about 15 minutes. Do not remove the lid during the cooking process. (If you have to peak, do it as quickly as possible, opening the lid as little as possible.)
Turn the heat off, but do not remove the lid, and let the rice steam for an additional 10 minutes.
When it has finished steaming, uncover the pot and gently cut and fold the rice with a flat rice paddle or spatula, bringing the rice up from the bottom to the top to release excess steam. Do not stir or mix forcefully, as this will break grains of rice and the texture can become mushy.
Remove the pits from the umeboshi and discard them. Chop the flesh of the umeboshi up, then gently fold it into the steamed rice. Add the finely chopped shiso leaves and toasted white sesame seeds and gently fold them into the rice. The rice is ready to serve or to be shaped into onigiri!