Wash the bokful and remove the stamen and calyx from inside each one of them to reduce bitterness. Keep them immersed in salt water for 10 minutes. Drain and keep aside.
Take besan, rice flour, cornflour, baking soda, poppy seeds, salt, turmeric, chilli powder and asafoetida in a mixing bowl. Add a little water at a time and make a smooth and slightly thick batter.
Heat oil in a deep frying pan over medium heat
Dip the bokful in the prepared batter, coat well and deep fry to a golden brown.
Remove the fried bok flowers with a slotted spoon and drain on absorbent paper.
Serve hot and crispy Bengali Bokful Bhaja with Khichdi.