01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, combine carrots, parsnips, sweet potato, beet, and red onion. Drizzle with olive oil, then sprinkle with salt, pepper, and thyme. Toss until evenly coated.
03 - Spread vegetables in a single layer on the prepared baking sheet, ensuring adequate space between pieces for proper caramelization.
04 - Roast for 30–35 minutes, stirring halfway through cooking, until vegetables are tender and edges are golden brown.
05 - In a small bowl, whisk together balsamic vinegar and maple syrup or honey until combined.
06 - Remove vegetables from oven. Drizzle balsamic mixture evenly over roasted vegetables and toss gently to coat.
07 - Return to oven for an additional 5 minutes to allow glaze to set and caramelize slightly.
08 - Transfer to a serving platter and sprinkle with fresh parsley. Serve warm.