YumMi gourmet food truck serves Vietnamese-style banh mi sandwiches in downtown Minneapolis Banh mi is a Vietnamese-style sandwich, consisting of a light baguette filled with your choice of protein, ranging from the classic pate and Vietnamese cold cuts, to Korean-style steak, caramel braised pork, five spice chicken or lemongrass tofu. Each banh mi is also accompanied by a seasoned mayonnaise spread, fresh slaw, pickled daikon and carrot and fresh herbs. Banh mi is a popular sandwich in Vietnam for anytime of the day, but especially for lunch. Hoa and James thought that this fresh, filling and well balanced item will be a welcome addition to the ever-expanding street food menu in the Twin Cities.