Boil 4 cups of water in a saucepan.
Remove from heat and add tea bags.
Steep for 5-7 minutes, then remove tea bags.
Stir in sugar until dissolved.
Allow to cool to room temperature.
Refrigerate for at least 1 hour.
Prepare serving glasses with ice cubes.
Pour chilled tea over the ice.
Garnish with fresh lemon slices and mint leaves.
Serve immediately and enjoy your iced tea!