Measure and keep all ingredients ready on the counter. Peel the potatoes and wash them well.
Chop the potatoes into cubes. Chop the tomatoes roughly.
Heat a pressure cooker with oil mentioned under tempering. Once hot, crackle cumin seeds.
To the hot tempering add curry leaves, hing , green chili and chopped ginger. Saute for 30 seconds.
To this now add chopped tomatoes and the dry masala powders. Let the tomatoes cook for a minutes.
Now dump the chopped potatoes and green peas to this. Mix well. Add salt and enough water to submerge the potatoes.
Close the pressure cooker and let this pressure cook for 4 whistles Let the pressure fall on its own.
Once done, open the lid and give it a brisk stir. Use a potato masher and roughly mash the potatoes. You can also use the back of the ladle.
The consistency must be saucy, if watery, after mashing the potatoes roughly let it boil for 5 minutes. if it is too thick, add ½ cup hot water and mix well.
Garnish the curry with fresh coriander leaves and serve it as side for roti.
Notes
I have equal amount of red chili and coriander seeds ground into powder just for north indian curries.
I have used the above red chili coriander powder for this potato masala curry