Found this great article entitled Speed Bento- Ice Cube Tray Nigiri. Sushi snobs would likely frown on the use of ice cube trays in making sushi, but if you are trying to prepare a lot of sushi it will save you the time and aggravation of trying to get the nigiri, or rice balls, to a uniform size. Just put the topping in the bottom of each section of the tray, and cover with sushi rice. For complete instructions, please follow this link.
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