Apple-Sweet Potato Casserole

2 large peeled and sliced Granny Smith apples
3 cups peeled and sliced cooked sweet potatoes
¾ cup brown sugar
½ tsp. salt
½ tsp. nutmeg
3 tbsp. butter

Preheat oven to 350 F. Spray 2-quart casserole dish with Pam. Layer half the apples and sweet potatoes in dish. In small bowl, combine brown sugar, salt and nutmeg. Sprinkle half of mixture on sweet potato/apple layer. Add second layer of remaining apples and sweet potatoes and sprinkle with remaining sugar mixture. Dot with butter. Cover with foil or lid and bake for 20 minutes. Uncover and bake for 10 more minutes.