Heat 2 tbsp. oil in a non -stick pan and temper with cumin seeds and asafoetida. Saute for a few seconds and then add the potatoes.
Fry on a medium flame for 2-3 minutes and add the onion, pinch of salt and turmeric powder. Continue to fry till it is cooked.
To the beaten egg add the red chili powder, kasoori methi and fried onions. Mix well and add the fried potato-onion mix. Combine everything well.
Heat the remaining 1 tbsp. oil and pour the egg mix. Cook on a low flame till one side is cooked. Then place a plate over it and carefully flip it over.
Slide it on the pan and cook on the other side too. Transfer to a serving dish and serve, garnished with coriander leaves.