Cucumber Soup
["2 Tbsp. margarine", "1/4 c. chopped onion", "2 c. diced unpeeled cucumbers", "1/2 c. diced raw potatoes", "2 c. chicken broth or 1 c. milk and 1 c. water", "1 c. watercress leaves", "2 sprigs parsley", "1/2 tsp. salt", "1/4 tsp. dry mustard"]
["Simmer above 15 minutes or until potatoes are tender.", "Cool. Puree in electric blender.", "Correct seasoning.", "Can be served cold or hot."]
["margarine", "onion", "cucumbers", "potatoes", "chicken broth", "watercress leaves", "parsley", "salt", "dry mustard"]