Cut beans into small pieces.
Cook them along with turmeric powder and salt, until half done.
Heat the coconut oil in a kadai or a pan.
Add mustard seeds and curry leaves.
When it starts to splutter, add the half cooked long beans and chillies and simmer, until it turn dry.
:- Serve with rice and curd or any gravy.
:- You can also use green banana, yam, potatoes and carrots and make mezhukkupuratti in the same way.
:- Similarly, bitter gourd, ladies finger and brinjal can be used. If using these veg, do not cook it in water.