Sweet Potato and Apple Casserole

3 medium size sweet potatoes
4 tart apples
3/4 tsp salt
1/2 cup brown sugar
3 TBSP butter

1. Preheat oven to 375 degrees.
2. Peel and slice potatoes and apples.
3. In a 2 quart casserole dish, layer potatoes and apples. Sprinkle salt on each layer of potatoes and brown sugar on each layer of apples.
4. Dot the casserole with butter.
5. Cover with aluminum foil.
6. Cook for 45 minutes.