3 large Earthbound Farm Organic carrots (peeled and cut into 1/2-inch chunks)
3 parsnips (peeled and cut into 1/2-inch chunks)
1 medium rutabaga (peeled and cut into 1/2-inch chunks)
1/2 cup olive oil (divided)
  Sea salt
  Freshly ground black pepper
1 small celery root (also called celeriac, peeled and cut into 1/2-inch chunks)
1 medium Earthbound Farm Organic Yellow Onion (cut into 1/4-inch dice)
4 cloves Earthbound Farm Organic Garlic (coarsely chopped)
8 cups good chicken stock (or vegetable stock)
2 tablespoons minced fresh tarragon
  truffle oil (as optional garnish)
2 ounces Parmesan cheese (shaved, as garnish)