Pat the chicken dry with paper towels and place it on a plate or cutting board.
Drizzle 1½ tablespoons of olive oil over the chicken and season evenly with salt, black pepper, oregano, thyme, rosemary, and minced garlic. Rub the seasoning into the chicken on all sides.
Peel and slice the carrots, then place them on a baking tray. Drizzle with the remaining olive oil and season lightly with salt and black pepper. Toss to coat evenly.
Preheat the oven to 400°F (200°C). Arrange the carrots in an even layer on the tray and place the chicken alongside them, leaving space between pieces.
Roast in the oven for 25–35 minutes, flipping the carrots halfway through, until the chicken is cooked through and the carrots are tender and caramelized.
Remove from the oven and let the chicken rest for 5 minutes before serving.
Finish with a squeeze of lemon juice if using and garnish with fresh parsley before serving.