Thanks to Moulin Rouge, the general public's interest in French dining has been remarkably renewed. This year, restaurateurs scrambled to take advantage. But the most successful eateries are usually the ones that precede the trend, and Oh La La is no exception. Open a couple of years now, Oh La La is oh-so-good with a blackboard menu that one evening might offer vichyssoise and on another might feature pheasant paté. Inspired regional cooking ranges from north to south with entrées such as roast duck breast with green peppercorns and a bouillabaisse so light and flavorful that the competitions' versions seem like fish-scrap soup. The only drawback is that dishes have a finite shelf life -- once they're gone, they're erased from the blackboard. So if you're a late diner, you might find your choices somewhat limited. But never fear. Regardless of your reservation time, your palate and stomach will still be stretched to satiated capacity.