In a  kadai    heat  oil,   add  the  cut  onion  , when  golden   brown add  garlic  , green  chilly  ,  tomato  pieces,followed by turmeric  ,  salt,  hing  powder  ,  curry  leaves  and  chilly  powder   mix thoroughly  ,  remove  from  fire  and  allow  to  cool,  then  grind in  a  mixer  with  out  adding  water