Crock-Pot French Onion Soup
["1/4 c. butter", "6 to 8 onions, thinly sliced", "4 (10 1/2 oz.) cans condensed beef broth", "1 soup can water", "2 tsp. Worcestershire sauce", "1/8 tsp. pepper"]
["Cook onions in butter until tender (about 20 minutes).", "Put into crock-pot; add remaining ingredients.", "Cover and cook on low for 4 to 6 hours.", "Top individual bowls with Swiss or Mozzarella cheese and broil until cheese is melted or Parmesan cheese may be sprinkled on soup before serving.", "Makes 10 to 12 servings."]
["butter", "onions", "condensed beef broth", "water", "Worcestershire sauce", "pepper"]