Rinse the sushi rice in cold water. Add the rice, a pinch of salt and the measured water to a pan with a lid and bring to a boil over a high heat. Once boiling, reduce the heat to low, cover, and cook for 15 min or until the water is absorbed and the rice is cooked. Once cooked, remove the pan from the heat and keep covered. Once cooled, add the rice vinegar and stir to combine.