Cream Of Potato Soup(Serves 100)  
["40 lb. potatoes", "4 bunches celery", "10 lb. onions", "24 cans evaporated milk", "1 gal. milk", "2 lb. margarine"]
["Put diced potatoes, celery and onions in pots.", "Add enough water to cover vegetables by about 1-inch.", "Add salt. Cook until tender.", "Pour off liquid to about 1/2 in each pot.", "Save some of the liquid for thinning soup later. Add evaporated milk and cook until slightly thickened and very hot.", "Add 1 to 1 1/2 sticks or margarine to each pot and some finely chopped parsley. Taste for salt.", "As the soup stands, it will thicken."]
["potatoes", "celery", "onions", "milk", "milk", "margarine"]