Milk: to knead( You can knead with lukewarm water as well but i prefer whole milk as it makes it softer and rich and perfect for serving kids as its healthier.)
Sieve the flours ,baking powder,baking soda,salt,sugar(Castor) together.
Add oil and rub the flour well to let the oil get incorporated well.
Add cumin seeds,carom seeds and mix.Now add curd and mix well.
Take milk or water and add gradually to knead it into a dough.Knead for 5-7 min to make the dough smooth.
Cover and lid and keep it in a warm place for 2 -3 hours to let it rise well.
Prepare filling: Heat ghee in pan.Add cumin seeds and let them splutter.Add minced ginger and cook for a second and add onions.
Let the onions get translucent add the all the masala’s and mix well.
Mash the potatoes with and hand in a bowl.Add the potatoes to the pan and cook on medium flame for 5-7 minutes or till the potatoes a little mushy and the masala is nicely mixed.
Switch off the flame and add the coriander leaves and keep aside to cool.
Once the dough has risen well, divide the dough into small equal portions to make kulcha’s.
Make equal size balls of the potato mix as well,as its easy to stuff and you get an even filling for all kulcha’s.
Take one dough ball flatten it a bit with your fingers and place the potato filling in the centre. Close and seal the dough with your hands and flatten again with your fingers.Do not use a rolling pin as it make break the kulcha as the dough is very soft.
Heat a pan or tava and cook on both side.Alternatively,if you like cook in a preheated oven @250 degrees Celsius for 10 minutes or till done.
Serve hot with butter on top .Relish with Curd or Pickle and salad.