Dry roast coconut and sesame seeds till the color changes very nicely.
Take pottukadalai flour, fine rava, butter, salt, roasted rava and coconut in a mixing bowl.
Add about 1/4 cup water (as less as needed) and knead to a soft dough. The secret lies in kneading, do not add more water than needed, but knead the dough very well until it is soft. Keep covered for 20 minutes.
Make tiny seedais from the dough and fan dry for 30 minutes on a clean plate or cloth.
Heat oil for deep frying. Deep fry the shaped seedais in batches in lowest flame. After adding the seedais in oil, you can close the pan if needed.
Deep fry until all the seedais turn golden brown and oil sound ceases. Allow to cool and store rava seedai in airtight container.
1. You can leave out coconut if you wish. 2. You can add ajwain/omam if you wish