Wash potatoes and cut them into cubes.
Boil them for about 7 - 8 mins and allow it to cool.
Next, peel them off and keep them aside.
Chop onions, ginger and green chillies finely and keep them aside too.
Heat oil in a vessel and put all the ingredients for tempering and fry them for 3-4 mins.
Add chopped onions, ginger, green chillies and fry for 3-4 mins.
Then, add peeled potatoes along with salt and mix well.
Put chopped curry leaves and coriander leaves.