Spray a large nonstick wok or frying pan with cooking spray and heat over a high heat. Add the preserved cabbage, garlic and ginger and stir-fry for 1–2 minutes.
Stir all the remaining ingredients except the noodles into the pan, reduce the heat to medium and simmer for 3–4 minutes.
Meanwhile, cook the noodles in a large saucepan of boiling water for about 4 minutes, or according to the packet instructions, until just tender.
Drain the noodles and divide between 4 warmed bowls. Ladle the cabbage mixture over and serve immediately.