It’s so easy to spatchcock a chicken, but if it seems complicated then ask your butcher to do it; alternatively roast as normal but increase the cooking time by double. That is the great thing about spatchcock chicken it cooks much faster. Getting the herbed butter up under the skin of the chicken gets all the flavour into the meat. You can also add one teaspoon of Dijon mustard and honey to the herbed butter for sweet peppery flavour. You can prep the chicken, including adding the herbed butter the night before and prepping the fennel.