Blanch the noodles and drain. In a large bowl, combine the noodles with 1 tablespoon oil, soya sauce and a pinch of salt and mix well.
In a large wok, heat the remaining oil until it shimmers. Add the garlic and shallots and stir and cook until fragrant. Add the mushrooms and a little of the mushroom water. Stir-fry until the mushrooms are soft.
Add the oyster sauce, koo chye, and salt and pepper to taste. Stir until well mixed and heated through. Serve hot.