French Onion Soup

1/2 cup butter or margarine
3-4 large Spanish onions, sliced thin
3 tablespoons flour
3 cans beef broth
2 beef bouillon cubes
2 tablespoons brown sugar
1 tablespoon Worcestershire sauce
4 1/4 cups water
salt and pepper
garlic
dry garlic bread
crouton
mozzarella cheese
swiss cheese

In large dutch oven, melt butter.
Saute onions until golden brown.
Add flour and blend.
Place onions in a slow cooker.
Add broth, and remaining ingredients.
Cover and cook on low at least 6=8 hours.
Serve in ovenproof bowls, with garlic croutons floating on top.
Cover croutons with mozzaarella or swiss cheese and broil until the cheese melts.