Heat 4T. butter or cooking oil in a heavy saucepan over low heat. Add 1 and-1/2 cups onions sliced about 1" long and 1/8" thick. Sauté onions about 20 minutes until they are tender and a rich brown color. Watch carefully so they don't burn. Add 4 cups cool water and stir in 1 package FFF Beef Soup Stock Mix. Add 1oz. sauterne or dry white wine if you wish. Bring the soup to a boil, reduce the heat and simmer 2-3 minutes. Gluten-free croutons covered with a slice of provolone cheese may be placed on the bowl of soup. Then place it under a broiler for a few seconds for the cheese to melt and brown. Serve immediately with a sprinkle of parmesan cheese. This makes 4 eight ounce servings.