Take chopped mint and ginger into a ding-chik and slightly mash and add to the water. Squeeze juice from the lemons and add to the water. Add sugar and salt and keep the jug in the refrigerator overnight.
Next day morning strain away the ginger and mint that is added to the water and add the soda water. Add some chopped fresh mint leaves if you would like and serve them in glasses.
This chilled lemon juice with ginger and mint flavour is sure a winner.