The best sandwiches, the ones you crave for days after ordering, are served family style one day and between bread the next. Owner and chef Reyna Duong was born in a small fishing village on the southern tip of Vietnam — a tattoo on her forearm bears the city's name — and grew up in Orange County. Sharing food was non-negotiable, a family's rite of passage, as it is at Sandwich Hag. The pork sausage banh mi — a neat rectangular patty, charred and surrounded by pickled radish, jalapeño, daikon, fresh cilantro and a Quoc Bao bakery baguette — is stupendous. Duong grinds the sausage daily by hand.