3 root soup with truffled Recipes

chopped onion (1 large), garlic cloves, chopped, unsalted butter, parsley root (about 4 1/2 lb total with tops), tops discarded and root peeled and chopped, thyme, turkish bay leaf or 1/2 california, white pepper, water, reduced-sodium chicken broth, extra-virgin olive oil, peeled roasted whole chestnuts (from a 7-oz jar)

vegetable oil, red onion, chopped, white potatoes (about 10 oz), peeled, sliced 1/2 inch thick, parsnips, peeled, sliced 1/4 inch thick, carrot, peeled, thinly sliced, turnip, peeled, halved, thinly sliced, more) water, chopped fresh chives, truffle oil