Pour water in a pan.
Switch on the stovetop to medium heat and let the water come to a boil.
Once the water boils, switch off heat and add black tea powder.
Add sugar as per the level of sweetness you want in the iced tea.
Mix well and let the tea leaves steep in the water for 4 to 5 minutes.
Once the tea is steeped, add lemon juice.
Stir well with a spoon.
Strain the tea in a glass or steel jar.
Let the tea cool to room temperature. Later, you can refrigerate to chill.
While serving, add ice cubes and lemon juice in a glass.
Pour the iced tea in the glass.
Garnish with a lemon slice.