Sweet Potato and Apple Scallop

2 cups thinly sliced boiled sweet potatoes or yams
1.5 cups peeled thinly sliced tart apples
half a cup brown sugar
4 tablespoons margarine
salt

Preheat the oven to 350F, grease a 1.5 quart baking dish.

Put had the potatoes in the baking dish.

Cover with half the apples, sprinkle with half the sugar, dot with half the butter and sprinkle with salt. Repeat layers.

Cover and bake for 30 minutes. Uncover and bake about 30 minutes more or until apples are soft.