Banh Mi 25 is a small sandwich shop in Hanoi that serves Banh Mi, a Vietnamese sandwich made with a baguette, pork, pate, and vegetables. The sandwich is crispy on the outside and soft on the inside, with a perfect balance of flavors. The shop also offers vegetarian options, making it a great choice for all types of eaters. The shop's interior is simple, with a few tables and chairs, but the food is delicious and affordable.