Take your duck remove any organs, the wing tips, wash thoroughly and drain.
Mix all of the ingredients for the marinade in a large heavy-duty food safe plastic bag and carefully add the duck. Seal and shake then place in the bottom of your fridge. Leave overnight and turn over a couple times if possible.
Remove the duck from the bag and wipe off the excess marinade then place on a rack in the bottom of your sink and carefully pour over a kettle of freshly boiled water. Pat dry and leave for a few minutes.
Brush with the glaze and allow to dry. Then repeat two or three times so the duck is a nice even colour.
Preheat your oven to 375 F / 190 C / Gas Mark 5
Wrap the wings with foil to prevent the wings get burned and place breast sides down in an oven proof baking tray. Place the tray in the oven.
Roast the duck for an hour and remove from the oven. Turn the oven up to 425 F / 220 C / Gas Mark 7.
Very carefully remove the foil and return to the oven for another fifteen minutes until a deep brown colour and crisp.
Remove from the oven again and rest for 10 minutes before cutting into pieces. Garnish and serve with hoisin sauce.