Preheat your oven to 200°C fan bake.
Place the butterflied chicken on a lined baking tray, breast side up. (see instructions above)
In a small bowl, mix together the butter, lemon zest, lemon juice, thyme, salt, and pepper.
Gently loosen the breast skin with the back of a spoon. (as shown in the video) Spread a little of the mixture underneath.
Add extra lemon slices or thyme sprigs on top if you’d like more flavour.
Roast the chicken for 1-1.15 hours, depending on size, or until the juices run clear and the skin is golden. Baste the chicken during the cooking to help guarantee a crispy golden skin. The chicken is cooked when the thigh internal temperature reaches 72c and above.
Rest for 10 minutes before carving.