Heat a pan and add oil in it, when it gets hot add mustard .

When the mustard splutters add the onion , green chilly and curry leaves in to it.

When it gets brown add the spring onion in to it and stir well.

Add little water and 1 tsp chilly powder and salt to it.

Then close it and wait for 5 minutes.

It will take only total 10 to 15 minutes for this olathu and it’s a nice combination with rice.

Transfer to the serving dish.