In a mixing bowl add buckwheat flour, grate or finely mash the potato, then add chopped coriander leaves, chopped green chilies, grated ginger, salt and mix it well.
Now, add little water (1-2 tbsp) at a time, knead the mixture and form the dough, use little more water if required and do not add too much otherwise it will difficult to roll.
Once dough is done, add oil and coat it all over, then divide the dough into small lemon sized balls.
Heat the griddle, take a one dough ball, dust it into the flour, roll it and make roti or medium circle disk.
Place the rolled roti on a heated griddle, once notice small bubble on roti surface, turn upside down and cook it till light brown spots.
Then cook it on direct flame till puff, the brown spot side should be up while cooking on direct flame.
Kuttu ki roti is ready, apply ghee and serve hot with aloo or kaddu ki subji.