Wash the coriander, mint leaves, ginger, green chillies in running water and grind them with water,vinegar, salt and lemon juice to a fine paste . Check for salt and store it until use. Keep them refrigerated.
Throw in all the ingredients in a vessel boiling with water. Simmer and cook them for 30-45 mins. Once done, remove from flame and cool. Grind them into a fine paste and store it in the refrigerator until use. I made Sev Papadi one day (recipe below) and served it with chai.