Peel the ginger. Put apple juice, ginger, star anise and cinnamon stick into a pot, bring to the boil and let it simmer at low heat for about 5 minutes. Add cider and red wine, heat up again and season with sugar. Remove cinnamon stick, star anise and ginger. Core the apple and cut into 4 thin slices. Divide hot apple mulled wine and apple slices into 4 glasses or cups