Glühwein - Mulled Wine

This recipe is based on one I found at the Frater Aloisius says HELL-O blog. Translated into English and slightly modified.

• 1 bottle of reasonably good, dry red wine
• 2 pc. star anise
• 3 cloves
• 1 cinnamon stick
• lemon zest
• juice of 1 orange
• orange zest
• 1 vanilla pod
• Demerara sugar

1. Put the wine in a pot, heat but do not bring to boil
2. Add the spices, the orange juice and the zest and leave to steep for approx. 10 minutes, keeping the heat just under the boiling point
3. Remove all spices &c.
4. Add sugar to taste
5. Serve in warmed cups or glasses