Dry the chillies, coriander seeds, turmeric stalks and the curry leaves together in hot sun.
Dry cumin seeds, black pepper corns, fenugreek, bengal gram dal together in hot sun.
On the day you are going to the mill, add raw rice, rock salt and grind it.
If you cannot dry in hot sun, you can dry roast all the ingredients individually one after the other except turmeric stalks and rice.
Transfer it to a large plate, let it cool down completely, add turmeric and rice before taking it to the mill for grinding.
You can also dry roast in a microwave following the same procedure of dry roasting on stove top.