Rinse 2 cups of short-grain rice under cold water until the water runs clear.

In a pot, combine the rinsed rice with 2.5 cups of water. Bring to a boil, cover, and simmer for 20 minutes.

Remove the pot from heat and let the rice sit, covered, for 10 minutes.

Fluff the warm rice gently with a fork, then sprinkle in salt to taste.

Fold in your choice of chopped vegetable fillings or optional ingredients.

Moisten your hands lightly to prevent sticking. Shape about 2 tablespoons of rice into a ball.

If desired, wrap each rice ball in a strip of nori.

Arrange the rice balls on a plate and serve with soy sauce.