Tet, the Vietnamese New Year, falls on Monday (Year of Dragon, yo), and there are giant moon cakes for sale at Nhu Lan Bakery, home of the finest banh mi in the land. There are also two new banh mi on the menu, the first sandwiching bo la lot, the betel-nut-leaf-wrapped beef cigars. I died a little when I saw they’d run out of those yesterday, but they did have bo kho banh mi (or bo ko, as they call it), which is not a sandwich but a rich stew of beef and carrot spiced with lemongrass and star anise.