01 - Combine water, cinnamon stick, cardamom pods, cloves, ginger, and star anise (if using) in a medium saucepan. Bring to a gentle boil over medium heat.
02 - Reduce heat to low and simmer for 5 minutes to allow spices to fully infuse into the water.
03 - Add loose black tea or tea bags to the saucepan. Simmer for another 3 minutes, or up to 5 minutes for stronger flavor.
04 - Remove from heat. Strain tea into a teapot or directly into cups, discarding spices and tea leaves or bags. Stir in sugar or honey to taste. Serve hot, garnished with lemon slice if desired.