Step 3: Form the Maki
Carefully wave a 4-by-7 1/2-inch sheet of nori over an open flame until crisp and fragrant, then transfer to a bamboo mat. Wet your hands in water that's seasoned with rice vinegar, then scoop up 1/2 cup of sushi rice. Gently form the rice into a loosely packed, palm-width log. Place the log at one edge of the nori and begin spreading it across to the other side