4 tablespoons butter
4 onions, chopped
4 cups beef broth
4 cups water
8 slices French bread, toasted
1 cup freshly grated Parmesan cheese
In a saucepan melt butter; add onions and sauté until tender. Add broth and water; simmer for 15 minutes.
Preheat broiler.
Divide soup among 8 oven-safe serving bowls. Float bread on soup, sprinkle evenly with Parmesan cheese, and place under broiler until brown, 3 to 5 minutes.
Makes 8 servings.