This cuts cooking time by 15-30 minutes ... This leaves the meat dry if it's in the oven too long. By flattening out the chicken, you’re exposing the legs to the heat of the convection currents ...
Preheat the oven to 225C/215C Fan/Gas 7. Pour the oil into a roasting pan large enough to hold all the chicken pieces in one layer. Place the pan on a high shelf in the oven for 15 minutes to heat up.