1. Heat the oil in a large cast iron frying pan. Add the scallions and ginger and saute for a few minutes, stirring frequently, till soft.
2. Add the radishes, wine, soy sauce, and water. Cover, bring to a boil, and then lower the heat.
3. Cook for about 20 minutes (time will vary based on the size of your radishes), stirring from time to time to distribute the flavors. When the radishes are cooked to your liking, uncover the pan and cook for another few minutes so the juices get more concentrated.
4. Serve warm or at room temperature.