Luosifen

Broth

The broth is made by boiling together river snails and pork bones, for upwards of eight hours.^[1][2] The snail meat disintegrates during cooking and adds a mellow, sweet flavor.^[3][4][1] The spice mix varies depending on recipe, and can include black cardamom, fennel seeds, dried tangerine peel, cassia bark, white pepper, bay leaf, licorice root, sand ginger, star anise, and Sichuan pepper. Besides pork bones, beef and chicken bones can also be used.^[3][1]

Toppings

Some common luosifen toppings are pickled bamboo shoots, fried tofu skin, fried peanuts, and wood ear fungus.^[5] Other possible toppings include pickled string beans, preserved cabbage, fried chickpeas, turnips, day lily, chili peppers, lemon vinegar, leafy greens, snail meat, seafood, and pork.^{[6][3][4][1][7]} In restaurants, diners often choose which toppings to include.^[8][4]

The characteristic smell of luosifen comes from the pickled bamboo shoots, a condiment traditionally eaten by Miao and Dong people.^[9] According to chef Zhou Wen, this is an essential aspect. "Without the bamboo shoots, the noodles will lose their soul."^[1] The bamboo shoots are fermented in salt water for one to two weeks. Aerobic and anaerobic bacteria convert the amino acids cysteine and tryptophan into aromatic compounds such as hydrogen sulfide, which smells like rotten eggs, and skatole, which can smell fecal or floral depending on concentration.^[3][10] There is disagreement on whether the smell is only mildly sour or pungent enough to be a bioweapon.^[3]

Some noodle stalls have head vegetables, preserved cowpeas, and shallots. Side dishes include duck feet, tofu, sausage, and marinated eggs. In the summer, stalls sell water spinach and Chinese cabbage, and, in winter, they sell lettuce, Yau Ma vegetables, mushrooms, cauliflower, and pea seedlings. Due to the limited information available, it is difficult to discern the authentic recipe. Many restaurants use tomatoes, leafy greens, diced chicken, chili oil, and chestnuts to enhance and balance the flavor. Others make it spicy by adding more peppers or chili. Some use sesame oil, red chili, jalapeños, tofu, cumin, and other spices to bring out the pungent flavor of the noodles and broth. ^{[citation needed]}

Noodles

The noodles can be made from older rice noodles for a chewier and firmer texture. The main ingredient of the soup is dried Liuzhou rice noodles. Unlike others, Liuzhou rice noodles are produced only with aged rice that has already lost its fat and gelatin component; this is why they are cooked al dente. They are immersed in cold water before they are added to the soup.^{[citation needed]}

Prepackaged instant luosifen noodles are prepared like instant ramen. The consumer boils water and adds the prepared sauce or other vegetables that comes with the package. ^[11]

Unlike other popular regional delicacies, luosifen is rarely prepared at home, and is a dish mainly consumed in shops and restaurants, and the skill in preparing the dish regarded as 'professional' due to its relative complexity.^[12]