01 - In a large bowl, whisk together buttermilk, olive oil, minced garlic, kosher salt, black pepper, paprika, dried thyme, lemon zest, and lemon juice until well combined.
02 - Place the chicken in a large zip-top bag or non-reactive container. Pour the marinade over the chicken, ensuring every piece is thoroughly coated. Seal tightly and refrigerate for at least 8 hours, ideally overnight.
03 - Remove the chicken from the marinade and let excess drip off. Discard the used marinade. Pat the chicken lightly with paper towels to remove excess moisture, then brush with olive oil.
04 - Preheat oven to 425°F. Place the chicken on a wire rack set over a rimmed baking sheet to allow even air circulation.
05 - Roast for 45–60 minutes until the skin is deep golden brown and juices run clear. Verify the internal temperature reaches 165°F in the thickest part of the thigh using a meat thermometer.
06 - Let the chicken rest for 10 minutes before carving to allow juices to redistribute. Garnish with fresh herbs if desired and serve warm.