How To make Cream Of Cauliflower Soup

2 tablespoons butter
1/4 cup sliced onion
1 stalk celery (with leaves)

minced
1 1/2 cups chicken broth
1 cup cauliflower :

cooked and coarsely
mashed 1 cup light cream
salt and freshly ground pepper -- to taste 1 tablespoon chopped fresh parsley
1 pinch nutmeg
Saut