Clean the Vaazhapoo, (Since vaazhappoo has many layers and rows of small flowers, remove only these small flowers and skin which looks like onion skin and discard them) .
Take some water in a vessel and cut the plantain flowers into the water in very thin, small size.
Remove the fibers from the cut plantain flowers (take a small stick and turn it in the water in which the cut plantain flowers are kept so that the fibers will roll on the stick and it can be discarded).
Remove water from the vaazhapoo pieces and keep it aside for about five minutes.
Heat oil in a frying pan and add the chopped onion into it.