A bowl of scalding broth under a layer of fat, with raw sliced meats, quail's egg, vegetables and rice noodles added at the table, in that order.
What makes it crossing-the-bridge noodles
Broth brought to the table at a boil, sealed in by a layer of fat.
Raw meat sliced thin enough to cook in the bowl.
Mǐxiàn — round rice noodles — added last.
Where it comes from
The best-known story has a scholar studying on an island in a lake near Mengzi, and his wife carrying his lunch across the bridge each day. She found that a layer of fat kept the broth hot all the way, and that he could cook the meat in it when it arrived. The tale is told a few ways, but the name stuck.
The bowl still comes as a kit: a broth of chicken and pork bones, very hot, then plates of raw pork, chicken and fish sliced paper-thin, a quail's egg, greens, and the rice noodles last.
How it varies
Xiǎoguō mǐxiàn
A near relation from Kunming: rice noodles cooked in a small copper pot, with minced pork and pickles.