Heat two tablespoon oil in a non stick pan.
Add curry leaves and mustard seeds and saute till the seeds splutter.
Add onions and saute till translucent
Add green chillies and saute further for two minutes. Add mashed potatoes and salt and mix well.
Add coriander leaves and mix well and set it aside. Divide into eight equal portions.
Meanwhile soak the bread slices in water for few seconds. Remove and squeeze out excess water.
Stuff the potato mixture in the center of the bread and roll it and then press it tightly. Do the same for the remaining.
Heat sufficient oil in a kadai. Deep fry the bread roll till golden brown and crisp in color.
Drain on absorbent paper.
Serve hot with tomato ketchup and khajur chutney.