01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large mixing bowl, combine carrots, parsnips, sweet potato, rutabaga (or turnip), and red onion.
03 - Drizzle the olive oil over the vegetables, then add thyme, garlic, salt, and pepper. Toss well to coat evenly.
04 - Spread the vegetables in a single layer on the prepared baking sheet.
05 - Roast for 35–40 minutes, stirring once halfway through, until the vegetables are golden and tender.
06 - Serve hot, garnished with extra thyme if desired.