Ingredients
- 1/2 cup unsalted butter
- 2 tablespoons olive oil
- 4 cups sliced onions
- 4 (10.5 ounce) cans beef broth
- 2 tablespoons dry sherry (optional)
- 1 teaspoon dried thyme
- salt and pepper to taste
- 4 slices French bread
- 4 slices provolone cheese
- 2 slices Swiss cheese, diced
- 1/4 cup grated Parmesan cheese
Description
A Slice Of French Bread Layered With Three Varieties Of Cheese Is Broiled On Top Of Individual Servings Of This Soup Of Spanish Onions Cooked In Beef Bouillon To Form A Rich Crust.
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