Cleaning the banana flower is a tedious process:
Banana flower consists of many layers of bract. You can see a bunch of florets under each bracts. First remove the pink layer. Take out the florets found underneath. Remove all the layers one by one till you find the white dome like structure and collect all the florets.In each floret, you can see a string in the middle with a tiny head called stamen and also a small plastic like white cover around it. Both are not edible so trash it.
Take a pan with water and turmeric and add all the florets to it .Allow it to boil until you find the foaming at the top. Take off the pan from heat. Allow it to cool .
In a blender, grind boiled florets, red chillies, salt, ginger, garlic first and then to this mixture add cumin, fennel, onion, curry leaves and grind it coarsely.
Transfer this mixture to a bowl and add roasted bengal gram powder, coconut powder, salt and asafoetida.
Heat oil in pan and make a flat patty/vadai in your palm.
Drop the vadai in hot oil and cook in medium flame. Fry until both sides are golden and crispy.
Hot crispy vadai is ready to serve.