Bún Chả Đắc Kim in Hanoi is a street food gem that serves up delicious vermicelli noodles with smoky pork and juicy pork patties. Their secret weapon? Nước chấm, a sweet chili fish sauce with pickled green mango that adds the perfect balance of sweetness and acidity to every bite. It's a win-win combo that keeps locals and tourists coming back for more. Just remember to bring cash because that's all they accept!