Heat milk till it is hot (No need to boil it).
Take all the flours in a bowl, add butter, then pour the hot milk over it and mix well.
Add salt, chopped onions, carrots and chopped leaves (after removing all stems). Mix everything.
Heat a cast iron tava (cast iron gives very nice crispiness to rotti).
Spread little oil or ghee and then spread a half inch thick layer of the mixture on the tava with your fingers(Dip the fingers in water before handling the mixture to make it easier to spread).
Cover the tava and let it cook, after couple of minutes, turn it upside down and cook on other side.
For a crispier texture, spread ghee/oil on top while cooking.