This is a delicious and easy cranberry sauce, requiring no time standing at the stove! I found it in a local newpaper article from a woman who got it from a magazine many years ago. It can be made ahead and stored in the refrigerator.
Preheat oven to 350 degrees. Wash and drain cranberries and place in a large bowl. In a separate bowl, combine sugar and cinnamon and then add to cranberries. Mix well. Spoon into a 9-inch square baking dish and cover with foil. Bake for 45 minutes. Remove from oven and stir in marmalade, lemon juice and walnuts (if using). Store in refrigerator.