01 - In a large saucepan, pour together the red grape juice, apple juice, and orange juice.
02 - Incorporate the cinnamon stick, cloves, star anise, peppercorns, sliced ginger, and orange zest into the juices.
03 - Place the saucepan over medium heat and gradually bring the mixture to a gentle simmer without boiling.
04 - Allow the spices to infuse the liquid by simmering gently for 15 to 20 minutes.
05 - Sample the infusion and add maple syrup or honey according to your preference for sweetness; stir well.
06 - Pass the mulled beverage through a fine mesh strainer into serving mugs.
07 - Optionally, garnish each mug with an orange slice and a cinnamon stick before serving warm.