Bún riêu  Bún riêu is a traditional Vietnamese soup of clear stock and rice vermicelli. There are several varieties of "bún riêu", including "bún riêu cua" (minced crab), "bún riêu cá" (fish) and "bún riêu ốc" (snail). This dish is well-known in the country and in the world. "Bún riêu cua" is served with tomato broth and topped with minced freshwater crab. In this dish, various freshwater paddy crabs are used, including the brown paddy crab found in rice paddies in Vietnam. The crabs are cleaned to remove dirt and sand. Then crabs are pounded together with the shell on into a fine paste. This paste is strained and the crab liquid is a base for the soup along with tomato. The crab residue is used as the basis for crab cakes. Other ingredients for this dish include tamarind paste, fried tofu, "mẻ" or giấm bổng (kinds of rice vinegar), "Garcinia multiflora" Champ., annatto seeds ("hạt điều màu") to redden the broth, "huyết" (congealed pig's blood), split water spinach stems, shredded banana flower, "rau kinh giới" ("Elsholtzia ciliata"), spearmint, perilla, bean sprouts and "chả chay" (vegetarian sausage). This dish is rich in nutrition: calcium from the ground crab shells, iron from the congealed pig's blood, and vitamins and fiber from the vegetables. "Bún riêu" has a fresh sour flavor, so Vietnamese like to enjoy it in summer. There are many restaurants in Vietnam that sell this dish.