NOTE: For a milder, sweeter tasting soup, substitute 8 ounces Swiss cheese for the cheddar cheese. Heat the butter in a large saucepan. Add the carrots, celery, and onion; saute for about 5 minutes until the vegetables are softened. Add the flour and cook over low heat until the flower is incorporated into the butter, about 1 minute. Stirring constantly, gradually add stock and then the cauliflower. Bring to a boil and simmer until the cauliflower is tender, or about 5 minutes. Stir in the grated cheese and cook for about 30 seconds until melted. (Do not bring soup to a boil after cheese is added or the soup will break.) Stir in the half-and-half; warm the soup over low heat. Season with cayenne pepper and 1 teaspoon salt or to taste. To serve, ladle the soup into warm soup bowls. Sprinkle each portion with the diced cheese and serve immediately. Makes 4 seervings. [ COOKS Magazine; Oct 1989 ] Posted by Fred Peters.