This recipe requires only four ingredients (onions, butter, French bread, and chicken broth), but you need to start simmering this soup ten to eighteen hours before you plan to serve it.
INGREDIENTS (for 8 servings):
- 3 pounds onions, sliced
- 1/2 cup butter, melted
- 7 slices French or Italian-style bread
- 4 1/2 cups chicken broth
Place sliced onions and butter into slow cooker and mix until onions are thoroughly coated.
Stir in bread and chicken broth. Cover and cook on low for 10 to 18 hours or on high 4 to 5 hours, stirring occasionally. Stir well during last hour and then serve.