Pressure cook the sweet potato till 2 whistles. Ensure not to cook this too much, or else it will be mashed. The best way to cook is to wash the sweet potato keep it inside a vessel and sprinkle a little water on this. You can cook this even with rice and dal too. That is it won't get mashed even after 5-6 whistles if u make it in this method. If u put it directly in the cooker it will be mashed soon.

Peel the skin and cut it into cubes.

Add sambar powder, salt, and turmeric powder to this.

In a pan add oil and add the mustard seeds, When it splutters add in the sweet potato mixture.

Mix well so that the powders coat the sweet potato evenly. Cook in a low flame. Cook for 5 minutes and add the chopped coriander leaves.

Cook till it is evenly roasted. It will take 7-10 minutes in a non-stick pan.

Sweet potato curry is ready to serve. It goes very well with sambar rice and rasam rice too.