Heat the cooking pot with oil until it smokes. Lower the heat and temper it with the dried chili and nigella seeds, cook for a minute and then add the potatoes
Increase the heat to medium and sprinkle the turmeric and salt over and mix well. Cover and cook for 3-4 minutes
Remove the lid, give the potatoes a gentle stir and now add the onion and fresh chilis. Mix well and again cover and cook until the potatoes are cooked (keep checking and stirring intermittently)
When done, turn the heat off and sprinkle the coriander leaves over. Serve your lip smacking Bengali aloo peyaj bhaja with dal and rice or any Indian flatbread. Enjoy!