Lucy's banh mi are the bomb.
I will confess that I've never had banh mi before, but these are very good. She's one of my favorite "restaurants" in town - definitely the best sandwich in the city. Even better when she's only charging $6 for them. I usually buy two and have one the next day for lunch - not nearly as good, but still good.
I'm not sure about Lucy's days or when she sets up for the day, but I know that she wraps up around 2 unless she runs out of bread earlier. I've been down there around 1:30 when she's just run out.