In a bowl, squeeze the lemon juice and keep aside.

In another bowl add the sugar and same quantity water and mix well till the sugar is dissolved. If you are in a hurry, then just heat the sugar water mixture in microwave for 1 minute and then stir to dissolve the sugar. Add the lemon juice with this mixture.

Now in a glass bottle or jug, add the mixture and fill the remaining portion with water. Add the mint leaves. Keep in refridgerator.

Before serving, add 2-3 ice cubes in an empty glass, pour the lemonade, garnish with lemon slice and mint leaves.