- 14 oz (400 g) all-purpose flour - 1 tsp (5 g) salt (for dough) - 3/4 cup (180 ml) warm water (for dough), plus more as needed - 1 tbsp (15 ml) vegetable oil (for dough) - 1.5 lb (680 g) beef shank or beef stew meat - 8 cups (1.9 L) water (for stock) - 1 2-inch (5 cm) piece fresh ginger, smashed, approx. 20 g - 2 cloves garlic, smashed (about 6 g) - 2 scallions (green onions), white and green separated, whites chopped, greens sliced for garnish - 2 tbsp (30 ml) light soy sauce - 1 tbsp (15 ml) Chinese black vinegar or black rice vinegar - 1 tsp (5 g) salt, adjusted to taste - 2 tbsp (30 ml) vegetable oil (for serving/tossing) - Chili oil or crushed red pepper, to taste (optional)
1. Make the dough: in a bowl combine flour and 1 tsp (5 g) salt. Whisk in warm water and 1 tbsp (15 ml) vegetable oil until a shaggy dough forms. Turn onto a lightly floured surface and knead 6–8 minutes until smooth and elastic. Cover and let rest 30 minutes. 2. Prepare the stock: place beef shank, 8 cups (1.9 L) water, ginger, smashed garlic, and the white parts of the scallions in a pot. Bring to a simmer, skim any foam, then reduce heat and simmer gently 1.5–2 hours until beef is tender and broth is flavorful. Remove beef, strain broth into a clean pot, and reserve beef for slicing into bite-sized pieces. 3. Season the broth: bring strained broth back to a simmer and add 2 tbsp (30 ml) light soy sauce, 1 tbsp (15 ml) black vinegar, and 1 tsp (5 g) salt or to taste. Keep at a gentle rolling boil for cooking noodles. 4. Shape the dough for slicing: divide rested dough into 4 pieces. Work with one piece at a time and keep others covered. Roll a piece into a firm cylinder about 1–1.5 inches (2.5–4 cm) thick, keeping hands lightly floured. 5. Knife-cut the noodles: hold the dough cylinder in one hand near the pot of boiling broth. With a sharp knife held at an angle, shave thin oblong strips off the dough directly into the boiling broth. Stir briefly to prevent sticking. Repeat until all dough is used; noodles will cook in about 2–3 minutes and float when done. 6. Assemble and finish: add sliced reserved beef to the broth to warm. Ladle noodles and beef into bowls, garnish with sliced scallion greens, drizzle 1 tbsp (15 ml) vegetable oil and chili oil if using. Serve hot.
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