2 tbsp orange-flavoured liqueur, such as Grand Marnier or Cointreau
Push 3 cloves into each strip of orange.
Mix the clove-studded orange strips and all the other ingredients together in a large pan. Half fill the wine bottle with water and add to the pan or add 375ml water. Bring up to simmering point on the hob. Barely simmer for 15-20 minutes – do not let it boil or all the alcohol will evaporate. Serve in slightly warmed, heatproof cups or glasses.