1Peel the sweet potatoes and cut them into slices.
2Melt the butter in a heavy skillet and add the sliced sweet potatoes.
3Mix the sugar, cinnamon, nutmeg and salt. Cover the sweet potatoes with sugar mixture and stir. Cover skillet, reduce heat to low and cook for about 1 hour or until potatoes are "candied". They should be tender but a little hard around the edges. Also the sauce will turn dark. You will need to stir occasionally during the cooking. Stir in the vanilla just before serving. Serve hot.
Footnotes
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.