Serious Eats - seriouseats.com

Andrea , Xiu Mai is indeed a catonese term and is also spelled like that in Vietnamese, however in this case The name Banh Mi Sao Mai is the name of the Business not of the sandwich itself. This is not a a recent invention, this sandwich has been served for years in Vietnam, and for years in America and New Orleans in many different varieties. Coincidentally it resides in a city rich with culture and cuisine. It is translated into a Po-boy hence Po-boy is a name for a sandwich. Blake you should try all the other varieties of Vietnamese Po-boys( Banh Mi O) here in New Orleans.