It's better to oil the hands, knife before chopping banana blossom.
Place a news paper, then place the cutting board, also you need a small bowl approx take 2-3tsp of mustard oil.Grease your hands and fingers with it. Open the outer layer of banana blossom,take out the flowers and take out from it "the hard somewhat blackish at the top stalk" , and chop them finely. Follow the same pattern for the other layer of blossom, until you reach the central heart , which would be slightly pale yellow or off white in color .Chop it finely , you will see the sticky gum ,coming out while chopping the banana blossom, slightly oil the hands and knife again and cut carefully . If you are using can's blossom first rinse those with warm water then just chop them...
How to get rid of the Bitterness of Mocha
Wash them in water thoroughly 2-3 times , fill in a large pan with water, add the banana blossom(Mocha) to it , add 1tsp of turmeric powder , ½ tsp of salt and bring to boil .Cook for 5-7mints .
Cover and stop the flame, let it cool off well, now discard the remaining water and take out the Chopped banana Blossom, squeeze in the remaining water with hands (yes that’s how our aunts and Mothers have been doing it)Or better use the sieve.
Directions for Mochar Ghonto
Sometimes to the above recipe, small shrimp or choto chingri mach or Bengal gram legumes (Kala Chana) is also added.