5. Put through a wire strainer, rubbing the potatoes through with a spoon.
6. Put into double boiler and place on stove.
7. Melt 1 tablespoon butter in a little pan.
8. Throw into it ½ tablespoon flour. Stir well.
9. Dip a little of the hot milk on this, stirring well, then pour into the soup.
10. Let boil 10 minutes.
11. Add 1 tablespoon chopped parsley. If too thick, add hot water or milk.
12. Serve very hot.