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1
Add 3 tbsp oil to a large soup pot or saucepan over med/high heat.
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2
Add the sliced onions and saute for 20 mins until onions begin to soften (don't let them brown!)
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3
Add the beef broth, water, salt, garlic powder and black pepper to the pan and bring mixture to a boil.
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4
When soup begins to boil, reduce heat and simmer for 45 minutes.
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5
To make the croutons, cut off the top part of each top of the hamburger bun so that the bread is the same thickness as the bottom half of each bun.
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6
Throw away the tops.
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7
Now you should have 10 round pieces of bread--5 bottoms and 5 tops with the tops cut off.
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8
Preheat oven to 325 degrees.
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9
Place the bread directly on the oven racks and bake for 15 to 20 minutes, or until each pieces is dark brown and crispy.
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10
Set aside.
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11
When the soup is done, spoon about 1 cup into an oven safe bowl.
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12
Put a crouton on top, and put the provolone cheese on top of the crouton.
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13
If you want, sprinkle 1/2 tsp of the shredded parmesan over the provolone.
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14
Set oven to high broil and put the bowl into your oven.
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15
Broil soup for 5 or 6 minutes, or until cheese is melted and is starting to brown.
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16
(Broil longer if you have more than one bowl in oven).
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17
Before serving add another teaspoon or so of grated parmesan, if desired.
