Ingredients
- 2 tablespoons butter
- 2 pounds yellow onions, halved and sliced 1/2 inch thick
- 4 (14 ounce) cans beef broth
- 1 (10.5 ounce) can beef consomme
- 1/4 cup grated Romano cheese
- Salt and pepper to taste
- 8 slices French bread, toasted
- 1/2 cup shredded Gruyere cheese
Directions
In a large pot over low heat, melt butter. Cook onions in butter until soft and golden brown, 15 to 30 minutes.
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Pour in beef broth and consomme and simmer 10 minutes.
Preheat oven broiler.
Whisk Romano into soup and season with salt and pepper. Pour soup into 8 ovenproof bowls. Top with toasted slices of bread and grated Gruyere.
Place bowls under broiler until cheese melts.