Rasam powder can be ground in a mixer at home. Does’nt take much time.
Coriander seeds 1 cup.
Toor dal 1/2 cup.
Channadal 1/2 cup.
Pepper corns 2 table spoons.
Jeera 1 table spoon.
Dry red chili 2 nos.
Place all ingredients in a microwave safe glass plate or bowl and micro high for45 seconds. this is just to dry the ingredients throughly. You can alternatively also dry in the sun for an hour.
Grind in the mixer into a fine powder.