
Preheat oven to 400F.
Brush a rimmed baking sheet or large baking pan with 1 tablespoon oil.
Halve any large carrots. Chop into 2-inch pieces. Add carrots to the pan and drizzle with remaining 2 tablespoons oil. Sprinkle with salt and pepper and toss to coat. Spread carrots into an even layer.
Roast for 25 minutes, stirring halfway through, or until carrots are tender and starting to caramelize. If browning too quickly before softening, cover loosely with foil. Sprinkle with chopped herbs before serving.