In grinder,add onion,tomato,kashmiri red chilies,salt and water,grind well & set aside.
In frying pan,add oil,split bengal gram and fry for 1 minute.
Add mustard seeds,cumin seeds and mix well.
Add asafeotida powder,curry leaves and mix well.
Add grinded paste,mix well and cook for 4 minutes or until oil separates.