You don't need celiac disease to be psyched that Opus opens tomorrow night on the Upper East Side. Chef Giuseppe Lentini's gluten-free dishes, including pastas (spaghetti with sea urchin, saffron, and lemon; gnocchi with sweet sausage and porcini-tomato sauce), apps (mini calzones, shaved fennel salad), mains, and house-made gelato, are a relief to those with gluten allergies or irritable bowel syndrome. Sure, think "ew" now, but you'll be thanking Lentini when you need a late-night snack. His restaurant is open till 5 a.m. [Strong Buzz]