Grind the urad dal, green chillies in the grinder/ mixie or food processor until nice and fluffy.

(Make sure you do not add a lot of water while grinding. Water has to be sprinkled 1 tsp at a time as needed to help grind the dal. Push the dals that are stuck to the sides of the grinder/food processor to the middle, so that they grind well too. Do not grind the batter for a long time. Stop the grinder/ processor on and off and sprinkle water as needed and do not keep grinding once the batter looks fluffy. Use really cold water to grind the batter especially if you are using a mixie or food processor.)

The batter is done when it looks fluffy and airy.

Now add finely chopped or grated ginger, salt, chopped spinach leaves, asafoetida and curry leaves to the batter and mix well. Now refrigerate the batter for an hour or more. ( I recently learnt from my mil that this gives very crispy vadas)

Now heat some oil in a frying pan. Oil your hands with sesame oil/ or other cooking oil and dip your hands in water slightly.

Use a spoon to put a dollop of batter in your palm and use your fingers or back of the spoon to make a hole. Transfer the batter to the other hand and drop it into the oil (since your hands have oil and some water in them, they will glide off easily)

Fry these vadas in medium high flame until nice and golden turning them as necessary.

Drain the excess oil in paper and serve hot with chutney or eat them as it is!