Peel the taro, and cut them into 1-inch (2.5cm) chunks. If you have sensitive skin, wear gloves for this!
Heat your wok over medium heat, and add the oil and the white parts of the scallions. Cook for 1-2 minutes until fragrant. Add the taro and 1 cup water along with salt, sesame oil, vegetarian oyster sauce and ground white pepper. Stir to combine.
Cover and cook over medium heat for 12-15 minutes, or until the taro is tender. Check periodically and add more water if needed to prevent sticking, as the water will cook off.
Once the taro is tender, and most of the liquid has cooked off (there should be some thickened sauce), stir in the green parts of the scallion. Taste and add salt if needed. Serve!