Soak the poppy seeds and mustard seeds in warm water, 15 odd minutes or so. Drain and keep aside.
Lightly scrape each kakrol, trim both the ends and halve longitudinally.
Simmer the kakrol halves in a pot of boiling water with a little salt, 5-7 minutes I would reckon, till the kakrol becomes tender, yet remains firm.
Gently scoop out the flesh with a spoon, taking utmost care to keep the outer case intact.
Grind the scooped out kakrol flesh with the poppy seeds, mustard seeds and 2-3 green chilies with just a splash of water to make a smooth paste.
Heat oil in a pan, add the paste, sprinkle in a little salt, throw in the finely chopped green chilies, cook over a low flame till the ‘pur’ (stuffing) is cooked and no longer sticks to the pan.
Add the freshly grated coconut, cook for another 2-3 minutes. Adjust seasonings, finish off with the chopped coriander leaves.
Allow the ‘pur’ to cool to room temperature. Using a tea spoon, gently fill the ‘pur’ inside the kakrol cases as shown in the picture.
In a bowl, mix the gram flour, rice flour, salt, turmeric powder and water to make a thick batter. Make sure there are no lumps.
Heat oil for frying.
Dip the stuffed kakrol in the batter, fry till a golden brown on all the sides. Keep aside on a kitchen absorbent towel.
Serve hot.