Bring a large heavy-based saucepan of salted water to a boil and blanch the noodles for about 2 minutes. Refresh under cold water.
Peel and finely chop the ginger and garlic. Cut the chile in half lengthwise, deseed, and finely chop. Shred the spring onions and pick the leaves from the cilantro. Wipe and slice the shiitake mushrooms.
Heat the sunflower oil in a large heavy-based wok. When hot, fry the garlic, ginger, chile, and mushrooms until brown, about 3 minutes. Add the noodles and spring onion; stir to combine, about 3 minutes.
To serve, arrange the noodles in a serving dish and garnish with cilantro leaves.
Recipe adapted from Lemongrass and Lime (10 Speed Books, 2001) by Mark Read and Christian Benians