- Peel and cube the potatoes into small bite sized peices, for easier cooking. 
- Heat oil in a saucepan. Fry the nigella seeds for a minute. 
- Add in all the ingredients into the pan with a little bit of water, and give a good toss. 
- Cover and cook on low flame, stirring occassionally till the potatoes get completely cooked. Sprinkle in water if it sticks to the bottom of the pan. 
- Serve warm with pooris or parathas.