I adapted this from The Way To Cook by Julia Child.
3 lbs apples, cored, quartered, unpeeled, sliced thinly in food processor
1 tablespoon cinnamon
8 tablespoons butter
Place apples in a bowl and toss with cinnamon. Place in large baking dish (I use a large pot with a lid) and dot with butter. Bake at 350 for about 1 1/2 hours, covered, stirring occaisionally. Serve with cream or ice cream!