Chop the boiled potatoes into small pieces.
Heat a kadai and add 2 teaspoon oil.
Add mustard seeds and after the flutter add cumin seeds and urad dal.
Add asafeotida, curry leaves and green chillies and sauté for few seconds.
Add finely chopped onion and sauté till onion turns pinkish.
Now add minced garlic and sauté till raw smell of garlic goes away.
Add turmeric powder and mix well.
Add chopped boiled potato, ½ cup water and mix well.
Simmer for 5 minutes.
Add salt to taste and switch off the gas.
Garnish with chopped coriander leaves and serve hot.