Similar to Pho, Bun is made of rice flour but instead of flat triangle shape like Pho, Bun has small and circular shape. Recipes to make Bun’s broth are even more diverse than Pho, which result in different vermicelli dishes, most popular ones are Bun Cha (vermicelli and grilled chopped meat), Bun Rieu (vermicelli and crab meat soup), Bun Thang (varied vermicelli), Bun Ca (vermicelli with fried fish) and Bun Oc (vermicelli and snail), while Bun Bo (vermicelli with beef) is specialty of Hue. Specific trait of Bun is an adequate sour taste the main ingredients of their soup are tomato, garcinia cowa and lemon lime.