Mocha Kottai is called as Field beans or Hyacinth bean or Val beans in English. It is a dry beans variety and is found in all Indian grocery shops. Also you can try the same recipe with karamani (black eyed beans). This is mochakottai/Val beans helps in digestion and its fibre content, helps in reducing the weight.
This is mocha kottai curry is a traditional and common dish among all south Indian families, especially in TamilNadu, India