One of my most fav poriyal is this chinese potato poriyal. I love this more than potato poriyal especially I love to have it with sambar rice.
The main difficult in making this poriyal is scraping the skin of this potato, it takes little time , it needs soaking then peeling.But to ease my step into enjoying this without any extra work I found this cleaned and peeled in frozen section. All I have to do is just dump the entire packet into tadka and cook it.
But this is one of the recipe you should try it if you like poriyal.So try and enjoy this recipe. 
Ingredients :
Chinese potato - 2 cups chopped
Salt - as needed
Turmeric pd - 1 / 2 tsp
Coconut oil - 2 tsp
Curry leaf - 1 sprig
Mustard seeds - 1 tsp
Gotsu powder - 3 tsp, if using gotsu powder add 1/2 tsp Chilly pd as my gotsu pd recipe don't have chilly pd in it.
If you don't have gotsu powder add sambar pd or Rasam pd or any kuzhambhu pd but add Chilly pd according to spice level.
If you don't have any kuzhambhu pd , just a tsp of Chilly pd would do an excellent job too.

Method :

1.Take a pan and add oil and once it's heated add mustard Seeds , curry leaf and a pinch of hing pd.
2.Then add chinese potato, turmeric pd,salt and spice pd and mix well and cover and cook till potatoes are cooked thoroughly.
3.Then open cover and cook till all potato is roasted and no more a little drop of moisture is there and serve hot with sambar or curd rice.