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Ingredients Jump to Instructions ↓

  1. ( view qty in metric system instead )

  2. 3 tbsp. vegetable oil

  3. 6 medium white onions, peeled and sliced

  4. 8 cups beef broth

  5. 1 cup water

  6. 2 1/2 tsp. salt

  7. 1/2 tsp. garlic powder

  8. 1/4 tsp. pepper

  9. 5 plain hamburger buns

  10. 10 slices provolone cheese

  11. 10 tsp. shredded parmesan cheese

Instructions Jump to Ingredients ↑

  1. Heat oil in a soup pot. Add onions and cook 15 to 20 minutes until translucent-don't brown. Add broth, water, salt, garlic powder and pepper. Bring to a boil. Reduce heat and simmer 45 minutes. Meanwhile, preheat oven to 325 degrees. Slice of tops of top bun to make the same thickness as the bottom bun. Place buns on a sheet pan and bake until golden brown and crisp, about 15 to 20 minutes. Set oven to broil.

  2. For each portion: Spoon 1 cup soup into an ovenproof bowl. Top with a bun half. Place a slice of provolone over and sprinkle with 1/2 tsp. parmesan. Broil 5 to 6 minutes until cheese is melted and starting to brown. Serve immediately.

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