Celeriac or Celery root is not the prettiest of veggies. You might pass it up so as to not have to wrestle with its thick ugly skin, but it's worth the effort of cutting away that gnarly mask to enjoy the sweet meat within.
I have a love of celery root and not just because it can keep you slim or pump up your potassium. I love it because it is delicious no matter how you cook it. Shred it and add a dressing allowing it to marinate and it's divine. Steam it and it melts in your mouth. Add it to a soup or a stew and the flavor will be more rich than celery itself.
It's a beautiful vegetable - you just have to go below the surface - so dig deep!