01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, combine all root vegetables and red onion. Drizzle with olive oil, sprinkle with salt, pepper, and thyme. Toss to coat evenly.
03 - Spread the vegetables in a single layer on the prepared baking sheet, ensuring they aren't crowded.
04 - Roast for 30–35 minutes, stirring halfway through, until vegetables are tender and golden at the edges.
05 - In a small bowl, whisk together balsamic vinegar and maple syrup or honey, if using.
06 - Remove vegetables from the oven. Drizzle with the balsamic glaze and toss gently to coat.
07 - Return to the oven for an additional 5 minutes to allow the glaze to set.
08 - Transfer to a serving platter and sprinkle with fresh parsley. Serve warm.