In a large pot combine the stock, onions, celery
and Worcestershire. Cook over medium heat for 30 minutes.
Add salt and beef base to taste. Add the caramel coloring as needed.
Preheat the broiler.
Fill a serving bowl with the soup
and top with some croutons and cheese. Place under the broiler until the cheese
melts and turns golden brown on top. Top with some parsley and serve.
This recipe was provided by a chef, restaurant or culinary professional and makes a large quantity. The Food Network Kitchens have not tested it for home use and therefore cannot make any representation as to the results.