- 4 medium-size sweet potatoes (about 1½ pounds)
- ⅔ cup plus 1 tablespoon
- Put the unpeeled potatoes in a saucepan and add cold water to cover. Bring to the boil and cook until barely soft, about 15 minutes. Drain.
- Cool the potatoes and peel them. Slice them and arrange the slices, slightly overlapping, in a buttered baking dish.
- Preheat the oven to