01 - In a large bowl, whisk together the 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 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 and brush evenly with olive oil.
04 - Preheat the oven to 425°F. Set the chicken on a wire rack placed over a rimmed baking sheet to allow even air circulation during roasting.
05 - Roast for 45–60 minutes, until the skin is deep golden brown and the juices run clear. The internal temperature should reach 165°F in the thickest part of the thigh when checked with 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.