firstly, in a large bowl take 2½ cup wheat flour, 1 tsp sugar, 1 tsp baking powder, ¼ tsp baking soda and ½ tsp salt.
mix well making sure everything is well combined.
now add ½ cup curd and start to knead the dough.
add water as required and continue to knead for 5 minutes
now add 2 tbsp oil and knead until the dough turns smooth and soft.
cover and rest for 1 hour or more.
after 1 hour, knead the dough again making sure the dough is soft.
pinch a ball sized dough and dust with wheat flour.
roll gently, making sure the roti is slightly thick.
now sprinkle some water and spread uniformly.
heat the tawa on medium flame, and once the tawa is hot transfer the roti onto the tawa.
make sure the waterside is facing down. press gently, so that the roti sticks to the pan.
cook for a minute or until the roti partially puffs up and the base gets cooked up.
now flip the tawa onto the flame and cook until the roti is cooked uniformly.