Preheat the oven: Set your oven to 425°F (220°C).
Place a large sheet pan or roasting pan on the middle rack to heat while the oven warms. A hot pan helps the chicken crisp.
Pat the chicken dry: Use paper towels to dry the chicken thighs thoroughly. Dry skin = crisp skin. Trim any excess fat if needed.
Season the chicken: In a small bowl, mix the salt, pepper, thyme, rosemary, smoked paprika, lemon zest, and half the minced garlic. Drizzle 1 tablespoon of olive oil over the chicken and rub the spice mixture all over, getting it under the skin where possible.
Prep the vegetables: Toss the carrots and onion with the remaining olive oil, remaining garlic, a pinch of salt, and a little pepper.
Keep the pieces chunky so they don’t overcook.
Arrange on the hot pan: Carefully remove the preheated pan. Spread the carrots and onion out in an even layer. Nestle the chicken thighs on top, skin-side up, leaving space between pieces for airflow.
Roast without peeking: Place the pan in the oven and roast for 30 minutes.
Don’t open the door; consistent heat gives better browning.
Check and finish: After 30 minutes, rotate the pan for even cooking. Roast another 10–15 minutes, until the chicken is deeply golden and the internal temperature reaches 175–185°F in the thickest part. The carrots should be tender with caramelized edges.
Optional crisping step: For extra-crispy skin, broil on high for 1–2 minutes, watching closely.
Don’t walk away.
Rest and brighten: Transfer the pan to a cooling rack. Squeeze a couple of lemon wedges over the chicken and vegetables. Rest 5–7 minutes so the juices settle.
Serve: Sprinkle with chopped parsley and an extra pinch of salt if needed.
Serve with remaining lemon wedges.