Let us start by washing and cleaning the banana flower for preparation. As I already mentioned, cleaning the entire flower can be tedious so I am going the easy way of using only the tender heart of the blossom (flower). The outer pink petals are quite hard, so we will remove a few of the outer petals as we use the more tender inner petals to make the dish.
Wash the flower head and discard the 4 to 5 outer pink petals which are quite hard and difficult to cook. I removed the outer 5 layers of petals along with the florets inside them (some parts of the florets inside are edible but quite difficult for me to clean up). The remaining white colored tender flower heart (with a light pink hue) is soft enough to be used in cooking easily.
Cut the banana flower finely as much as possible (don't cut the hard stem at the end of the flower, we will discard the stem after the chopping the remaining edible parts of the flower only, or else the petals will fall off making the chopping more difficult). If there is too much fiber in the flower, you may cut the flower head in thicker circles and remove some of the fibers with your hands, and then chop the pieces finely.
Once all the edible part of the banana flower is chopped finely, discard the hard stem and transfer the chopped flower pieces to a large bowl. You can either add diluted buttermilk (by mixing the buttermilk and water) to the bowl with the banana flower or add water mixed with little turmeric powder, salt and coconut oil. You can soak the chopped banana flower in buttermilk overnight for best results, although this is not necessary. If you are in a hurry, you can soak this for just about 15 to 20 minutes.
After soaking the chopped banana flower in buttermilk or water with turmeric, salt and oil, drain the water and gently squeeze the chopped flower to remove any remaining water. This will help to reduce the natural bitterness of the flower (the bitterness is very slight, once we finish the cooking you don't feel any bitterness usually). Now we can make the seasoning and start cooking the banana flowers which is already chopped and soaked.