OK, so it's not exactly new in traditional restaurant parlance, which entails a new name, owner and cuisine. But York St., which has been around for a dozen years, sure tastes different. After purchasing York St. earlier this year, chef Sharon Hage cleaned it up, yanked out bolted-down clutter, whitewashed the walls, added some mirrors and created a new logo (the "Y" looks like a twig). But these are just minor adjustments compared with what she has done to the food. Hage's touch doesn't unleash dramatic cuisine, nor visually compelling cookery. What springs is a gathering of subtle flourishes that, taken in its entirety, pulses with both imaginative artistry and disciplined harmony. For example, Hage creates a horseradish broth in which to bathe her mussels. To this, she flecks the puddle with specks of smoky ham. Slightly weird, incredibly good. Strokes like this abound, from the lavender sea-salt rubbed chicken in foie gras potato sauce to the ivory salmon with wilted pea shoots. This place isn't for everyone. It has no see-and-be-seen appeal, and the sight lines kind of suck--even for a 42-seat cubicle. But if you revere food, there's no better place. One taste, and you'll be a York dork for life.