Saute bacon and drain off 2/3 of pan drippings leaving 1/3 third in pan. Add celery and onion and saute. Add vinegar and turn up the heat to reduce by half. Then add the dijon mustard and seasonings, sugar, and kitchen bouquet. Cook a bit then add the cornstarch mixture (cornstarch + cold water) Cook until thickened. Cool. Keep in glass jars. Reheat in microwave and serve over greens