I mentioned this elsewhere yesterday, but it was deep in an aging thread, so I'll ask here: Has anyone else here had the strange, cold hockey puck, in green tea or strawberry flavor, that they call "ice cream" at the Appetizer Plus sushi buffet in Rosslyn? It has the texture of a bean paste concoction when you bite into it, and then becomes creamy and refreshing and full of flavor. Is there a name for this creation? Do any other restaurants serve it? Do any of the markets carry it?