You can find the fresh shiitake mushrooms in most Asian grocery stores. If not, you can use dried shiitake mushrooms by soaking them in warm water for 30 minutes, drain and then dice. Pre-fried tofu can be found in most Asian grocery stores. If not, you can use fresh firm tofu. The vegetarian mushroom oyster sauce (http://amzn.to/1ZCC1rO) and mushroom seasoning (http://amzn.to/1SnEcen) can also be found in most Asian grocery stores. You can use either the vegetarian mushroom oyster sauce or the ABC sweet soy sauce (http://amzn.to/205TPbL) (both contain wheat so they are not gluten free). For a gluten free option, you can replace the same amount of mushroom oyster sauce with tamari sauce (http://amzn.to/205TFkD). The fried noodles for garnishing and are optional. You can prepare them in advance by deep frying some bean thread noodles (cellophnae noodles).