Preheat oven to 375F. Arrange potatoes in 13 x 9 x 2-inch glass baking dish. Combine sugar, butter, cinnamon, salt, nutmeg and ginger in heavy small saucepan over medium heat. Bring to boil, stirring until sugar dissolves. Pour over potatoes; toss to coat. Cover dish tightly with foil. Bake potatoes 50 minutes. Uncover; bake until potatoes are tender and syrup thickens slightly, basting occasionally, about 20 minutes. Increase oven temperature to 500F. Top potatoes with marshmallows and nuts. Return to oven; bake until marshmallows begin to melt and nuts begin to brown, about 3 minutes. Serves 8. Bon Appetit November 1994