Heat the water to 75–80°C (167–176°F), do not boil. Add the green tea bags and steep for 2–3 minutes maximum. Remove the tea bags without squeezing and let the tea cool to lukewarm.
While the tea is still warm, stir in 2 tablespoons of honey until fully dissolved. Taste and add up to 1 additional tablespoon only if needed. Let the tea cool to room temperature.
Rinse the mint leaves and gently clap them between your hands to release aroma. Do not chop or muddle — that extracts chlorophyll and bitterness.
Add the prepared mint to the cooled tea. Refrigerate and let infuse for 10–15 minutes only, until a strong, clean mint aroma develops. Remove the mint promptly to avoid grassy flavors.
Continue chilling the tea for 1–2 hours until fully cold and crisp.
Fill glasses with ice, pour over the mint green iced tea, and garnish with a fresh mint sprig if desired