Legume is a small restaurant up in Regent Square that serves up extremely tasty food in a not so formal setting. Their menu changes daily depending on ingredients the chef can get his hands on. The chef is from Maine originally and thus is a stickler to high quality seafood; the restaurant actually gets all their seafood shipped directly from the suppliers instead of through distributers.
I've tried their duck confit and pate as appetizers. I was originally surprised to see duck confit listed, as it's not a dish I have run across in Pittsburgh ever (if you know where I can get it, let me know!). Both appetizers are definitely worth having again.
I've tried their lamb chops; perfectly seasoned and cooked to medium rare. Their cassoulet is rich and hearty and perfect for the cold winter months. The proteins they use are sausage, pork, and duck confit along with the beans of course. The flavors were rich, but it was a tad too salty for me, and my palate already prefers the food I eat to be heavily seasoned.
They do take reservations now, so that's always a good thing. They're also BYOB ($4 corkage). And every now and then they have special events for special occasions, so definitely be on the lookout for those as well.