Mix all the ingredients for the omelette and fry it in the oil.
Slice into square pieces when cool and set aside.
Grind the ingredients for the masala and keep aside.
Heat your saucepan and pour the oil. Once oil heats, add the onions, green chillies and salt and saute till slightly browned.
Add the ground paste and fry for 2 minutes or till the raw smell goes away.
Add in the tomatoes and vinegar and cook till the tomatoes get smashed.
Add the water and simmer for 10 minutes till the mixture slightly thickens. Adjust the salt.
Add the cut omelette peices and simmer for a further 5 minutes.
Garnish with coriander leaves and serve warm.