Whole sage leaves and thyme sprigs are tossed with carrots and parsnips to add aromatic flavor as they roast.
Preheat oven to 400°F. Toss together all ingredients in large baking dish, and season with salt and pepper, if desired. Roast 15 minutes, then shake dish to loosen vegetables. Roast 15 minutes more, then shake again, and roast 10 minutes more, or until tender.