Mix coconut, onions, curry leaves, green chilies, coriander leaves, and salt properly with little water. Add the ragi flour with some more water and mix properly so that it mixes with other ingredients (This dough should be like chaptai dough). Set aside for some time. Put some oil on tava (cooled tava). Roll small portions of dough to form medium sized roti. Apply oil around the roti and bake at low flame till it is done with the lid closed. Eat the ragi roti with delicious pudina chatney