Wash curry leaves and pat them dry using a kitchen towel /newspaper for few hours to remove excess water.
Take curry leaves in a pan.Dry roast them on low flame stirring in between for few minutes till they start shrinking.The curry leaves should be crispy and get crushed when u press it with your hands.Keep them aside.
To the same pan, add oil and roast urad dal ,chana dal ,coriander ,pepper,red chilli ,hing and tamarind.Let the lentil turn olden brown and chillies crisp.
Switch off. Add roasted curry leaves to it , mix and allow to cool.
When cool, grind this into a fine powder in a mixer. Ensure that the mixie is dry.
Store this in an airtight container and handle it with a clean ,dry spoon as and when needed.Serve with idli ,dosa,paniyaram etc or just with hot rice topped with ghee or oil.Yumm....
Notes
You can roast curry leaves in a microwave too.
Dry roast all the ingredients in medium heat or else it will burn soon n won't be roasted properly.
If you want you can add little dry coconut too .Roast and grind it with other ingredients.