1 tablespoon melted butter/vegetable oil for cooking
150 grams leftover idli batter
2 tablespoon finely chopped coriander leaves
1 small onion chopped finely
1 teaspoon ginger-garlic paste
to taste Salt
1 tablespoon oil/butter for greasing
1 teaspoon cumin seeds
6-8 curry leaves chopped finely
2 green chillies chopped finely
1 teaspoon turmeric powder
1 teaspoon cumin powder
1 pinch asafoetida/hing powder
as needed Water
2 potato peeled and chopped roughly