1 lb (1 oz.) cheese slices (mozzarella, Munster or Swiss)
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Let's Make It
Slice the onions into 1/4 - 1/2 inch slices. Put the butter into a large pot and melt on low heat. Add the onions and stir until coated. Continue stirring until the onions are softened.
Add 9 cups of water. Bring to a boil. Add the bouillon cubes and stir until they are dissolved. Bring to a boil. Turn down heat and simmer for about 5 or 10 minutes until the onions are to your liking.
Place a roll or a large slice of Italian Bread in a bowl. Place 2 slices of mozzarella, Munster or Swiss cheese over the roll. Pour the very hot soup into the bowl. The cheese will melt from the soup.