Heat frying pan to very hot then add the duck, skin-side down, without added fat and cook for 3-4 minutes, turning occasionally, then remove to a preheated oven at 220°C / Fan 200°C / Gas Mark 7 for 10 minutes.
Remove, rest for 5-10 minutes then cut into slices and serve.
Cooking appliances vary in performance, these are guidelines only. Ensure product is piping hot throughout before serving. Do not reheat once cooked.