Sour Pho (Phở chua)

Phở chua is a traditional phở variety. The first version of this noodle soup usually contains six key ingredients – pink rice noodles, peanuts, pickles, soy sauce, sour pickle liquid, and Northern sauce. The second version consists of two components – dry ingredients and the broth, with the dry ingredients including noodles, sliced and fried potatoes, pig's liver, and roasted duck meat, while the broth is made from garlic, vinegar, and sugar.

Both of these versions are popular in Northern Vietnam, and the dish is garnished with fresh herbs, fried shallots, or crushed peanuts before serving. Sour phở is usually prepared and served during summer and autumn, and it's often prepared for special guests and visitors.