01 - Preheat the oven to 425°F (220°C) and line a baking sheet with parchment paper.
02 - Place carrots in a large bowl, drizzle with olive oil, then add salt, pepper, thyme, and optional garlic powder. Toss until evenly coated.
03 - Spread carrots in a single layer on the prepared baking sheet.
04 - Roast for 20 to 25 minutes, turning halfway through, until carrots are golden, caramelized, and tender.
05 - Transfer carrots to a serving dish, sprinkle with parsley and lemon zest if using, and serve warm.