Preheat the oven to 160C.
Rub the Chinese five spice powder and salt evenly all over the duck, then place it breast side down in a deep roasting pan.
Bake in the oven for one hour.
| For a less spiced flavour, leave the Chinese five spice out or replace with ground ginger for an even more Christmassy flavour.
Take the duck out of the oven, and carefully drain away any fat that has accumulated in the roasting pan.
Turn the duck around, so it’s sitting breast side up.
Place the plums and onion wedges around the duck, then drizzle them with the soy sauce and honey.
Return the duck to the oven and bake for another hour.
| Roasting the duck breast side down for the first hour ensures that all that indulgent duck fat runs through the breast, preventing any dryness.