Celeriac (Celery Root)

This week's adventures in trying unfamiliar produce has lead me to celeriac, or celery root. This variety of celery is cultivated specially for its edible root. Celeriac's swollen, knobby external appearance often scares off beginners. However, once peeled, it is a nutritious healthy vegetable with more natural flavor than most root vegetables. I am experimenting with substituting celeriac in