French Onion Soup
["1 1/2 lb (3 large) onions, thinly sliced", "1/4 cup butter or margarine", "3 10 1/2 oz cans condensed beef broth", "1 tsp Worcestershire sauce", "1/4 tsp. salt", "dash pepper", "2 french or hard rolls, sliced and toasted", "grated parmesan cheese"]
["Cook onions in butter till lightly browned, about 20 minutes. Add broth and worcestershire.", "Bring to boiling.", "Season with salt and pepper.", "Sprinkle toast with cheese; place under broiler till cheese is lightly browned.", "Pour soup in bowls and float toast slices atop.", "Makes 6 to 8 servings."]
["onions", "butter", "condensed beef broth", "Worcestershire sauce", "salt", "pepper", "hard rolls", "parmesan cheese"]