Make sauce: [br] In small bowl, mix all sauce ingredients. Set aside.
In medium bowl, soak mushrooms in 1/2 cup cold water until softened, about 30 minutes. In another bowl, soak noodles in hot (not boiling) water to cover 5 minutes.
Drain mushrooms and squeeze dry (reserve soaking water to use in soups). Cut off and discard stems; thinly slice caps and set aside. Drain noodles and set aside.
In wok or large deep skillet, heat peanut oil over high heat. Add mushrooms, scallions, garlic and ginger and stir-fry 1 minute. Add carrot, water chestnuts, bamboo shoots, baby corn, and cabbage and stir-fry 2 minutes.
Add sauce, cover and cook 5 minutes. Gently stir in noodles and tofu until well coated. Reduce heat to low, cover and cook until some of the sauce is absorbed, about 5 minutes. Serve at once.
This recipe is one that we order every time we eat out at a Chinese restaurant. I finally decided that it was one I could easily, and deliciously, make at home. It's very forgiving-use fresh mushrooms instead of dried, add snow pea pods if you wish, toss in some red pepper flakes if you want it spicy, use tamari instead of shoyu soy sauce (we just like the flavor of shoyu better), omit the bean thread noodles and serve over short grained rice. If you like your sauce thicker, mix 1 tablespoon corn starch with 2 tablespoons water, add and stir in when you add the sauce.