Banh mi -- Vietnamese sandwiches with a distinctively French twist -- are the plats du jour here, every jour of the week. There are a dozen or so varieties available at the counter, from classic pork p?t? with pork and more pork to spicy pork and barbecued pork and even all-vegetable offerings, all mounted on dwarf baguettes that have the distinctive delicacy of masterful baking. No matter what's on your sandwich, it costs just $2.50, which should leave plenty of change for an iced Vietnamese coffee or lychee soda.