Instructions
1/4 cup butter
4 cups thinly sliced onions
1 1/2 teaspoons salt
2 tablespoons flour
4 cups beef broth
Combine butter and onions in skillet. Cover and cook slowly, about 15 minutes. Blend in salt and flour. Add beef broth. Heat to boiling. Reduce heat and simmer for 15 minutes to an hour. Pour soup in bowl, float a toast round topped with cheese over top.
