Pressure cook the potatoes.

Cut the onion finely.

Once the pressure releases, peel the potatoes and mash them.

Take oil in a pan, add mustard seed, as they crackle put the onion and saute for sometime. Let it turn translucent.

Put the red chilly and green chilly to it, stir, after a few seconds put the mashed potato and salt. Mix well.

Serve hot aloo bharta with phulka or chapati.