Slice the soaked tofu skins into strips. Shred the soaked fungus, if using. Set aside.
Heat the oil in a wok over high heat until very hot, and stir-fry the garlic, ginger, chilies, and onion for 2 minutes. Add the tofu skin, fungus and carrot. Stir-fry for a further 1 to 2 minutes.
Stir in the salt, sugar, and 2 tablespoons of water. Cover with a lid