Onion Soup
["1 c. finely sliced onion", "4 Tbsp. butter", "2 cans beef consomme", "2 cans water", "2 Tbsp. horseradish", "1 tsp. mustard", "Parmesan cheese", "toast"]
["Cook onion in butter until soft and yellow.", "Add the consomme, water, horseradish and mustard.", "Simmer 20 minutes.", "Serve with a thick slice of toast on top.", "Sprinkle with Parmesan cheese."]
["onion", "butter", "beef consomme", "water", "horseradish", "mustard", "Parmesan cheese"]