Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1       tb           Oil
     1/2   c            Onions -- chopped
   2       lb           Ground beef
     1/4   c            Chili powder
   1       t            Cinnamon
   1       t            Cumin
     1/4   ts           Allspice
     1/4   ts           Cloves ground
   1                    Bay leaf
     1/2   oz           Chocolate unsweetened
   2       cn           Beef broth
   1       cn           Tomato sauce
   2       tb           Cider vinegar
     1/4   ts           Ground red pepper
                        Spaghetti -- cooked
                        Chedder cheese -- grated

Preparation:

Heat oil in a large saucepan over medium heat. Add onion and cook, stirring frequently, until tender, about 6 minutes. Add beef, in batches if necessary, and cook, breaking up with a wooden spoon, until browned. Add remaining ingredients, except spaghetti and cheese. Stir to mix well. Bring to a boil. Reduce heat to low; cover and simmer 1 1/2 hours, stirring occasionally. Best if you now refrigerate overnight. Remove the bay leaf. Reheat gently over medium heat. Serve over hot, drained spaghetti. Top with shredded cheddar cheese.