Pour boiling water over the Mu-Err mushrooms, leave to soak and cut into strips.
Pour boiling water over the udon noodles and let them steep for 2 - 3 minutes until they are soft and you can pull them apart.
Briefly fry the chopped garlic and ginger together with the shallot in a little oil and then add the thin strips of beef, fry very briefly, add the Mu-Err mushrooms and season with a little salt. Immediately afterwards fry the noodles briefly and then add the Chinese cabbage, soy bean sprouts, soy sauce, oyster sauce and 2-3 tablespoons of water, season with salt and pepper as desired and only continue to fry for a short time.