Peel and grate carrot and radish. NOTE– Do not take out their water.
Mash boiled potato.
Take a large mixing bowl and add rajgira flour, grated carrot, boil potato radish, cumin seed, chopped coriander, ginger, oil, and salt as per taste. Mix well with your hands.
Do not add water at this stage. First, combine nicely as carrot and radish leave the water as soon as they come in contact with salt. NOTE- I did not require any extra water while mixing this. In case if you need, add spoon by spoon a little water. Make a soft dough.
Now divide the dough into equal parts and start rolling them gently. Dust with dry flour from time to time. Do not worry if paratha breaks from sides. Seal it and roll again with the help of dry flour.
Heat a tava or skillet and place the rolled paratha on it. Cook in medium heat. Keep flipping till it gets brown color on both sides. Apply little oil on both sides and cook.
Once both sides cooked properly take it on the paper towel. Repeat the same process with the rest of the dough ball.
Serve hot with curd or falahari sabji.