Lay the chicken breast side down. Using very sharp kitchen shears, cut along one side of the backbone, close to the bone. Turn the chicken around and cut along the other side, so that the backbone can be removed.
Turn the chicken over, and press down firmly on the breast until you hear a snap. The chicken should open out flat.
Place the chicken on an ovenproof tray with a rim. Drizzle with oil olive, thyme and seasoning. Roast for 45 mins, or until the juices run clear.
If possible leave the chicken to rest for 15 minutes before carving.
Notes
You can also use other woody herbs such as rosemary or sage in place of thyme.
If using a large or small chicken, you'll need to adjust the cooking time.
Please check carefully that the chicken is fully cooked through. If you pierce the thickest part of the thigh with a skewer, the juices should run clear.