add chopped onions, chilies, ginger, coriander leaves, curry leaves along with salt and cumin seeds to a bowl and squeeze out the juice by mixing well.
now add one cup of ragi flour and dry mix with the above mixture.
add boiling water as needed and make a soft dough.
make it smooth and soft.
you may pat the dough on a banana leaf / aluminium sheet or on a plastic sheet. grease the aluminum foil with oil.
take a ball and spread it evenly and as thinly as possible. grease your fingers with oil / water if the edges break..
if the edges are cracking, then dip your finger with some water and gather it and seal the crack.
make some holes in between to make sure the oil gets absorbed uniformly well.
once the griddle is hot enough, gently, drop the sheet upside down on the griddle. after a minute, gently peel the sheet off.
smear some oil around the rotti and cook both the sides.
make sure to roast until golden brown. serve the rotti hot with chutney, butter and masala tea.