Sweet Potato and Cranberry Casserole

4 sweet potatoes, cooked

1/2 cup brown sugar

2 tablespoons butter

1 cup fresh cranberries

1/2 cup orange juice

Walnut Topping:

1/2 cup chopped walnuts

2 tablespoons melted butter

1 tablespoon brown sugar

1/2 teaspoon cinnamon

Slice potatoes and place half in buttered 1 1/2 quart casserole.  Sprinkle with 1/4 cup brown sugar.  Dot with butter.  Sprinkle with 1/2 cup cranberries.  Repeat.  Pour orange juice over all.  Cover. Bake 45 minutes at 350.  Uncover.  Distribute walnut topping.  Bake 15 minutes longer.