French Onion Soup

8 c sliced yellow onions
4 cans Swanson’s beef broth
½ cube butter
1 can water

On medium heat, sauté onions in butter until transparent and golden. Add broth and water. Cover and simmer on low for 3 hours, adding water as necessary. Dish into oven-safe bowls. Top with French bread cut into cubes. Sprinkle with grated Swiss cheese. Broil in oven until cheese is bubbly.

Source: Heather Hart