Prepare vegetables. Basically you need to slice them into thin strips or cut into small pieces. I used 1 Carrot, a handful of Snow Peas, 100g cooked Bamboo Shoots, 5 Shiitake Mushrooms. Other suggestions include Shimeji, Enoki, Beans, Black Fungus (Kikurage), Garlic Chives, Bean Sprouts, Pak Choi, etc.