Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      cups          stewed tomatoes
   2      tablespoons   flour
   2      tablespoons   melted butter
   1      small         onion -- diced
                        salt and pepper to taste

Preparation:

Heat stewed tomatoes. Mix melted butter and flour. Stir in tomatoes. Add onions, salt and pepper. Cook, stirring constantly, until thick.