Old Fashioned Barbecue Sauce

Grind onions, celery, bell peppers, parsley, onion tops and garlic. Mix all ingredients in pot of your choice and cook over a low fire for about 1-1/2 hours. You have to stir frequently. This will yield you about 1/2 gallon of sauce. After the sauce is cooled, skim off oil from top of sauce and save for basting your favorite meat while cooking outdoors. The remaining sauce may be used as you would prefer after your meat is cooked.