01 - In a large mixing bowl, whisk together the buttermilk, 2 tablespoons olive oil, minced garlic, kosher salt, black pepper, paprika, dried thyme, lemon zest, and lemon juice until thoroughly combined.
02 - Place the chicken in a large zip-top bag or a non-reactive container. Pour the marinade over the chicken, turning to ensure it is evenly coated on all sides. Seal tightly and refrigerate for at least 8 hours or overnight for optimal flavor penetration.
03 - Take the chicken out of the refrigerator and remove it from the marinade, letting any excess drip off. Discard the used marinade. Pat the chicken lightly with paper towels to remove surface moisture, which helps achieve crispier skin.
04 - Preheat the oven to 425°F. Set the chicken on a wire rack placed over a rimmed baking sheet. Brush the chicken evenly with 1 tablespoon olive oil to promote browning.
05 - Roast the chicken for 45 to 60 minutes, until the skin is deep golden brown and the juices run clear when the thickest part is pierced. The internal temperature should reach 165°F in the thickest portion of the thigh when checked with a meat thermometer.
06 - Remove the chicken from the oven and let it rest for 10 minutes before carving to allow the juices to redistribute. Garnish with fresh herbs if desired and serve warm.