In a medium saucepan, bring 2 cups of water to a boil.
Once boiling, remove from heat and add the black tea bags. Steep for 5-7 minutes, depending on your desired strength.
Remove the tea bags and stir in the sugar until fully dissolved. Allow the tea to cool to room temperature.
In a large pitcher, combine the cooled tea, passion fruit juice, and fresh lemon juice. Stir well to combine.
Refrigerate the mixture for at least 1 hour to chill.
To serve, fill glasses with ice cubes and pour the passion fruit iced tea over the ice.
Garnish each glass with fresh mint leaves and lemon slices.