Grind together mint leaves, coriander leaves, ginger, sugar, roasted cumin powder, chaat masala, amchur powder, black pepper and black salt in a smooth paste.
Add some water to the paste and then strain it.
Add more water to the strained mixture and mix it well.
Then add lemon juice and stir.
Add ice cubes too.
Add some boondi as well.
Serve chilled in glasses!