01 - In a large mixing bowl, whisk together the buttermilk, 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, ensuring it is completely and evenly coated. Seal tightly and refrigerate for at least 8 hours or overnight for optimal flavor penetration.
03 - Remove the chicken from the marinade and allow any excess to 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 surface of the chicken evenly with olive oil to promote browning.
05 - Roast for 45–60 minutes, until the skin is deep golden brown and the juices run clear. Verify doneness by checking that the internal temperature reaches 165°F in the thickest part of the thigh or breast using a meat thermometer.
06 - Remove from the oven and let the chicken rest for 10 minutes before carving to allow the juices to redistribute. Garnish with fresh herbs if desired and serve warm.