Heat Oil in a pan (preferably thick bottomed)
Add finely chopped onions and fry till they become light pink
Add green chillies and curry leaves, fry for few seconds
Bung in the chopped tomatoes
Add the powdered spices and salt
Cover and cook till tomatoes become soft, we only want the tomatoes go soft don't fry it till it becomes dry as the moisture will help making the dish soft.
Add the fish eggs and mix by stirring, keep stirring till all the eggs becomes white.(if you dont stir the fish eggs will start sticking to the pan)
Fry the eggs (constantly stirring) in Low to medium flame till the oil starts oozing out of the fish egg bhurji. You need to fry it for about 8-10 minutes in slow flame. Don't wait till the oil starts foaming as this will make the eggs too hard and grainy.
Turn off the heat and garnish with green coriander