Place the green tea, rose petals, and coriander in a pitcher. Bring 1/2 cup / 120ml water not quite to a boil. Pour it over the tea leaves wait ten seconds, then add the remaining 3 1/2 cups water.
Refrigerate until the tea is a strength you like - typically 4 - 8 hours. Strain and serve over ice.
Makes 4 cups
- Alternative brew: Substitute a handful of fresh mint, and four coins of bruised ginger for the rose petals and coriander.