With a vegetable peeler, remove zest (colored part of peel) from oranges.
Bruise zest with back of a spoon to release fragrance.
In a tea pot, combine zest, flavored tea leaves, and boiling water.
Cover and steep for 5 to 7 minutes.
Strain; discard tea leaves and zest.
Add chopped ginger to tea and let cool.
Add orange juice and sugar; stir until sugar dissolves.
Pour tea over 6 ice-filled glasses; garnish each glass with an orange slice and mint, if desired.