Potato Celery Root Puree

Directions

1. 1
   In a large saucepan combine the potatoes and enough salted cold water to cover them by 2 inches.
2. 2
   Bring the water to a boil, and boil the potatoes, covered, for 4 minutes.
3. 3
   Add the celery root, simmer the vegetables, covered, for 10 to 15 minutes, or until they are very tender, and drain them well.
4. 4
   While the vegetables are still hot force them through a food mill fitted with the medium disk into a saucepan.
5. 5
   Add the butter, milk, lemon juice, salt and pepper, and stir the puree well.
6. 6
   (The puree may be made up to 1 day in advance and kept covered and chilled.)
7. 7
   In a heavy saucepan reheat the puree over low heat, stirring constantly, until it is hot.