Sau (Dracontomelon) is a common fruit in Hanoi. Giving a special sour taste, it is an indispensable ingredient of many Hanoi’s specialties like rice vermicelli soup with baby back pork ribs and sau fruit.
Bun Thang, or Hanoi-style rice vermicelli soup, is a peculiar dish showing a delicate culinary style of Hanoians. This is a perfect combination of colors and flavors.