I have made this sauce before but this time I used a little different ingredients and it was very good.
Finely chopped some shallots.
Melted some butter in oil. Add mustard seeds, dry red chilies and garlic. Added the shallots and cooked till they softened a little.
Added lots of finely chopped ripe tomatoes.
If you don’t like skin then you can blanch them beforehand.
Salt will hasten the softening of the tomatoes.
Once they are really soft add turmeric and red chilly powder.
Spread it on the pan and add eggs. Do it carefully and keep them separate.
Cover and cook on low flame for 8 mins.
Open and add chopped coriander.
Cover and cook for 3-4 mins and then leave it covered.
You can eat this as it is or with roti, dosa or idly.