Peel the hard-boiled eggs. Makes 4 slits on each egg and set aside.
Heat the oil in a saucepan. Crackle the mustard seeds.
Saute the curry leaves for a minute.
Add in the onions and chillies and saute with a pinch of salt till the onion becomes just wilted.
Add the ginger paste and cook for a minute till the raw smell goes.
Add in the coriander powder, turmeric and garam masala and saute till the coriander gives a darkish shade.
Add very little water, just to moisten the masala. Adjust the salt.
Add the whole eggs and cook on low flame with closed lid for 5 minutes. Switch off and serve warm with chapathis, rotis or appam.
Notes
The spice level is mild, considering no addition of chilli powder. To make it more spicy, add more green chillies. Onions have to just be soft, don't overcook since the roast needs the crunch of the onions.