Glühwein

Cut the orange into slices, put the cloves into one of the slices so they don´t float around and get into your guest´s glasses.

Put the wine into a large pot and add the orange slices, cinnamon, star anise and the sugar.
Put on a low heat and heat.
Leave on low heat for at least 15 minutes, but the longer the better.
Make sure it doesn´t boil, as this will evaporate the alcohol.

Before serving, heat up the glasses in warm water. This will prevent them from breaking.