The cleaned raw Hilsa fish chunks are coated with thick pastemade with coconut, ginger, mustard and mustard oil and then being steamed for12-15 minutes in a low flame; This is How to Make Bhapa Ilish/Ilish Mach Bhapa/Steamed Hilsa .
Take a blender; Add coconut pieces, ginger and 2 greenchilies
Make a smooth paste
Add soaked mustard seeds in the blender
And make a paste
Take 3 tbsp curd
Take a Tiffin box with cover; then add all the ingredients. E.g,coconut ginger paste, mustard paste, 1 tbsp mustard oil, curd, salt, turmericpowder, salt and coriander leave.
Mixwell with the help of your fingers; and coat well the Hilsa fish chunks
Nowafter mixing well the fish chunk, again sprinkle 1 tbsp mustard oil and choppedcoriander leaves and cover the lunch box
Now take a deep and big bowl/patila/pan; and put a stand andadd water, the water level should below the stand.
Now slowly place the lunch box over the stand
Cover the lid of the pan and allow cooking in low flame for12-15 minutes
After 15 minutes open the lid and with the help of a napkin open the lunch box.