2) Cut the carrots, parsnips, sweet potato, and butternut squash in 2-3cm cubes. All the vegetables will shrink while baking, so don't cut them too small.
3) Place all the cut vegetables in a single layer on 2 baking sheets. drizzle them with olive oil, salt, and pepper. Toss well. Bake for 25 to 35 minutes, until all the vegetables are tender, turning once with a metal spatula.
4) Sprinkle with parsley, season to taste, and serve hot.