01 - Heat the oven to 425°F (220°C) and line a large baking sheet with parchment paper.
02 - Combine carrots, olive oil, honey, thyme, sea salt, and black pepper in a large bowl; toss to coat evenly.
03 - Spread the coated carrots in a single layer on the prepared baking sheet.
04 - Roast for 25 to 30 minutes, turning halfway through, until tender and caramelized on the edges.
05 - If desired, toss the hot carrots with unsalted butter just before serving for additional richness.
06 - Transfer to a serving platter, garnish with extra fresh thyme, and serve warm.