Iced tea with orange and lemon slices is one of Martha's favorite summer drinks.
Bring 4 cups water to a boil. Add tea bags and steep for 4 to 6 minutes. Remove and discard tea bags. Add remaining 2 cups water. Refrigerate until cold, at least 1 hour.
Fill a large pitcher with ice. Add orange and lemon slices and chilled tea. Pour into glasses with ice, and garnish with mint.