Mash aloo with salt then add suji cornflour.
Then add Dhaniya powder jeera powder garam masala salt to taste hing and mix well.
Add the green chilli and coriander and mix well
Make a soft dough if need just sprinkle water..
Roll the roti on butter paper with oil or wet hands to flatten then add it to the hot tawa and cook on both sides with ghee or oil