Celeriac Puree

Directions

1. 1
   In a saucepan, add the potatoes, celeriac, and milk, then fill the pot with enough cold water so the liquid covers the vegetables by about 2 inches.
2. 2
   Bring to a boil over high heat; salt generously.
3. 3
   Decrease the heat to low, and simmer until the potatoes and celeriac are tender when pierced with a knife, about 20 to 25 minutes.
4. 4
   Drain the vegetables in a colander, discarding the liquid, and return them to the saucepan over medium heat.
5. 5
   Cook, stirring constantly, until a floury film forms on the bottom of the pan, 1 to 2 minutes.
6. 6
   Mash the vegetables in the saucepan until smooth with a ricer, food mill, or potato masher.
7. 7
   Add the butter, stirring vigorously, until well combined.
8. 8
   Taste and adjust for seasoning with salt and pepper.
9. 9
   Serve immediately.