Sushi rice is a short-grain rice that is seasoned with vinegar, sugar, and salt to give it a tangy and slightly sweet flavor. It's the perfect base for making sushi rolls, but can also be served on its own as a side dish. To make sushi rice, rinse the rice until the water runs clear, then cook it in a rice cooker or on the stove. Once the rice is cooked, mix in the seasoned vinegar and let it cool to room temperature before using it for sushi rolls.