In a tall glass or big bowl add the yeast, sugar and luke warm water. Allow it to rest for 10 minutes. You can see it bubbling up. and ready to use.
In a big wide bowl add the flour and salt, mix well (or the dough wont ferment well )then add the yeast mixture.
Add the butter in room temperature, curd and then milk (add little by little).
Be careful so your doesn't turns soggy. If too dry add a little more milk.
cover the bowl and let it rest for minimum 1hour.
you can see it risen and kneed it a little and make it to small balls.
Dust your rolling board with little flour and roll out a dough ball.
In a flat hot pan (in medium flame) add a 1/4 tsp butter and add the rolled naan after 10 seconds flip it and cover with a lid for 30 seconds. remove the lid and flip it again. And your Naan is ready. Repeat it for all the dough.
Serve it hot with butter chicken, Dal or Paneer butter chicken or your choice of gravy.