Soak kokum in a cup of warm water for 45 minutes.
Grind the soaked kokum in the mixer(along with the water) and make a smooth paste.
In a pan add sugar and water and boil for approx 5-8 minutes and make a syrup(thick like gulab jamun syrup)
Let the syrup cool down completely.
Add the kokum paste in the sugar syrup and mix well.
Strain the syrup through a fine sieve.
Now add black salt,roasted cumin powder and lemon juice in it.
Now the kokum sharbat concentrate is ready.
You can easily store this concentrate in the refrigerator for a week.
How to serve-Add 3 cups of chilled water and ice cubes in the concentrate(can also add some mint leaves)
Apply some lemon juice on the rim of the serving glass.
Mix some sugar and roasted cumin powder and spread it in a plate.
Dip the glass rim in this mixture..
Gently pour the sharbat in the glass and serve.