Recent addition to the little Watertown spot's menu: Shrimp donut (described as "Fried shrimp paste with carrots, sesame oil, cilantro and bread crumbs). Good enough to start a craze. Savory, not sweet, not quite like anything I've tasted before. But definitely a donut. Two for $6. More revolutionary than anything you'll find at, say, Union Square Donuts.