Cut five yams in quarters and par boil. Drain in colander and let cool. Peel off skins.
Slice one more time, into rounds, and start to line a casserole (souffle pan works well), with a layer of sweet potatoes. Dot with butter, drizzle with brown sugar, layer with dried apple, rounds. Repeat, a layer of yams, dot with butter, drizzle with brown sugar, layer with dried apple rounds...and so on until it fills the casserole allmost to the top. (optional, a tiny bit of cinammon and nutmeg sprinkled on each layer, before the dried apple layer)
Pour a cup and a half of fresh orange juice over the yams and apples.
Bake in the oven for one hour at 350° F.
Serve hot.