Desired number of sweet potatoes or yams
Brown sugar
Chopped walnuts
Mini marshmallows
butter, cubed

Cook potatoes in skins until tender (steam or boil). Let cool and peel. Slice thin. Layer in baking dish beginning with potatoes. Sprinkle generously with brown sugar, nuts, cut up butter and marshmallows. Repeat with potatoes, sugar, nuts, etc. Do about 3 layers, ending with marshmallows. Cover with foil and bake at 350 degrees for 45 minutes. Can make the day before.