Take a bowl ,add curd,besan,dhania powder mix everything and strain these in a thick bottom pan. now boil this for 5 min or till the raw smell goes. add tumeric powder while it is cooked. in a kadai put oil ,add jeera,curry leaves,red chillies,and onions. fry till it  turns golden brown .add this to the curd mixture. add  little water if it is too thick ,finally add salt as per taste. garnish it with chopped coriander.