Wash and peel the yam/suran and dice it (same size as chopped onion). Soak it in saltwater for 15-20 minutes.
Mix the chopped onions, green chilies and coriander leaves. Add salt to the salad at the time of serving.
Drain the water from the diced yam/suran and dry on a paper towel. Heat the oil in a pan and deep fry the yam/suran pieces till golden brown in color.
Drain off the excess oil on a paper towel. The yam/suran should be crisp. This can be made and stored in a container to use just before serving so that the yam/suran remains crisp.
Mix the fried yam/suran with the chopped onions, green chilies, coriander and salt and serve.