Umeboshi paste Cook rice in water over medium-high heat until tender and water is absorbed; cool to room temperature. Cut carrot in 1/2-inch match sticks and steam lightly. Place several spoonfuls of rice in the center of each nori sheet; follow with several carrot sticks and a dab of umeboshi; and roll up into a ball. Serve with a sauce made of soy sauce and grated ginger. Found in health food or oriental food stores.