01 - Set the oven temperature to 425°F.
02 - Pat chicken thighs dry with paper towels and season both sides evenly with kosher salt and black pepper.
03 - Warm olive oil in a large ovenproof skillet over medium-high heat until shimmering.
04 - Place chicken thighs skin-side down in the skillet. Cook undisturbed for 7 to 8 minutes until skin is golden brown and crisp.
05 - Distribute rosemary sprigs, smashed garlic cloves, and lemon zest around the chicken in the skillet.
06 - Transfer skillet to the oven and roast for 20 to 25 minutes, or until internal temperature reaches 165°F.
07 - Let chicken rest for 5 minutes. Serve hot, garnished with additional rosemary and lemon wedges as desired.