Preheat oven to 500ºF. Place whole chicken breast side down on a work surface. Using poultry shears (or a knife), remove the backbone. Drizzle some olive oil in a large roasting pan. Place chicken in the pan breast side up and press down firmly to flatten. Season all over with kosher salt and pepper. Tuck any herbs you have on hand under the skin and under the chicken itself. Drizzle with olive oil and rub all over. Roast for about 30 minutes. If serving right away, let rest 10 minutes before carving. If you are planning on pulling meat from the bones, let rest until cool enough to handle.