French Onion Soup
["4 large onions, thinly sliced", "1/4 c. butter or margarine", "3 (10 1/2 oz.) cans condensed beef broth", "1 tsp. Worcestershire sauce", "1/2 tsp. salt", "dash of pepper", "toasted bread", "grated Parmesan cheese"]
["Cook onions in butter until lightly browned, about 20 minutes. Add broth and Worcestershire sauce.", "Bring to a boil.", "Season with salt and pepper.", "Sprinkle toast with cheese; place under broiler until cheese is lightly browned.", "Pour soup in bowls and float toast slices on top.", "Serves 4 to 6."]
["onions", "butter", "condensed beef broth", "Worcestershire sauce", "salt", "pepper", "bread", "Parmesan cheese"]