Place the mangoes along with water in a sauce-pan and bring to a boil.
Simmer for 10 minutes.
Simultaneously, you can pressure cook the mangoes with water till soft.
Let them cool and then peel the mangoes and get the pulp with the help of a spoon.
Grind mango pulp along with water to a smooth paste.
In a pan take the pulpy mixture, add sugar and let it cook on flame till the sugar dissolves completely.
Stir continously lest you burn the mixture.
Remove from fire and add roasted cumin powder, black salt and salt.
Let this mixture cool down properly.
To make the drink : take a tall glass pour 1 -2 tblsp of the mango mixture and pour in chilled water till 3/4 th. Now add finely chopped mint and crushed ice.