Soak semi-dried kokum in 1 cup of hot water for 2 to 3 hours.
Soak sabja seeds in little water for 30 minutes.
After 30 minutes, the sabja seeds would have absorbed water and swollen up. Keep it aside.
After 3 hours, squeeze and mash the kokum in the bowl in which they are kept soaked.
Transfer the kokum alongwith the water to the mixer jar and blend to a coarse paste.
Strain the kokum paste and extract thick kokum juice.Discard the kokum after extracting juice.T
o the kokum juice, add rock salt, sugar and roasted cumin powder.
Mix well till the sugar dissolves.
Now add 4 glasses of chilled water.
Stir in the soaked sabja seeds. Mix well.
Serve chilled.