1 + 2 extra sprigs Fresh Thyme or Rosemary, chopped
1 tablespoon Kosher Salt
2 teaspoon Freshly Ground Black Pepper
3 tablespoon Extra Virgin Olive Oil
Place the chicken on a cutting board, skin side down, and using your hands, press down hard to make it as flat as possible.
Mix together the thyme or rosemary leaves, salt, pepper, garlic and 1.5 tablespoon of the olive oil, and rub this all over the chicken. Tuck some of the mixture under the skin as well.
If time permits, cover and marinate in the refrigerator for up to a day (even 20 minutes of marinating boosts the flavor).
When you are ready to cook, preheat the oven to 500 degrees. Then preheat an ovenproof 12-inch skillet (preferably nonstick) over medium-high heat for about 3 minutes. Then put remaining olive oil in the pan and wait about 30 seconds for it to heat up.
Place the chicken in the skillet, skin side down, along with any remaining pieces of herbs and garlic; weight it with another skillet or with one or two bricks or rocks, wrapped in aluminum foil. The idea is to flatten the chicken by applying weight evenly over its surface.
Cook over medium-high to high heat for 5 minutes, then transfer to the oven. Roast for 15 minutes more.
Remove from the oven and remove the weights; turn the chicken over (it will now be skin side up) and roast 10 minutes more, or until done (large chickens may take an additional 5 minutes or so).