Preheat oven to 220ºC.

Use your fingers to gently loosen the skin on the turkey breast. Place lemon slices and sage leaves in a neat layer between the skin and the breast.

Rub butter all over the skin, massaging it in. Season with salt and pepper and place in the oven for 30 minutes or until it is a light golden brown. Reduce oven temperature to 180ºC and continue cooking for 1 ½ to 2 hours or until the turkey is cooked through.

Remove from oven, cover with foil and leave to rest for 20 – 30 minutes before serving.