1. Heat the vegetable oil in a large saucepan. Add the dried chilies, ginger and garlic. Fry until the garlic starts to color, then gradually stir in the chili bean paste.
2. Add the minced pork or beef, breaking it up with a spatula or wooden spoon. Cook over high heat until the minced meat changes color and any liquid has evaporated.
3. Mix all the sauce ingredients in a jug. Make a well in the center of the pork mixture. Pour in the sauce mixture and stir together. Simmer for 10-15 minutes until tender.
4. Meanwhile, cook the noodles in a large saucepan of boiling water for 5-7 minutes until just tender. Drain well and toss with the sesame oil. Serve, topped with the meat sauce and garnished with the spring onions.