Pressure cook potatoes, peel and mash them and set aside.

heat oil in a pan and add mustard and urad dal.

When they crackle, add in chopped onions and green chillies.

Saute for a minute or two until golden.

Add mashed potatoes, turmeric and salt.

Give a nice mix, cook on low flame for two or three minutes and remove from flame.

Serve it with rice or chapathi.