Take a blender jar, and add sugar, fresh mint leaves, lemon juice, cumin seeds powder, black pepper powder, chaat masala, black salt, salt, ginger and ¼ cup of water in it.
Blend it well till all sugar dissolved and make smooth juice liquid.
Now strain the mixture in to a small bowl.
Take 2-3 serving glasses, pour the prepared mixture into the glasses.
Add some mint leaves, lemon slice and crushed ice or ice cubes in it.
Just before serving, pour the soda over it, garnish it with mint leaves, sprinkle some chaat masala, cumin seeds and serve chilled fresh.