I hesitate to pile in with yet more advice on this epic thread. but here goes.....
- we use both yeast and baking powder. The yeast is not so much for aeration - it does something to the texture
- allow about 1 level tbsp sugar and 1 tsp baking powder per naan - it should be a very sweet dough
- add oil to the dough. About 1 tsp per naan.
- never work with a dry dough; it should be almost too wet to handle
- 3 hours before cooking, split the dough into balls about the size of a snooker ball. Rub the balls of dough in oil, put them on an oiled tray, cover with a towel and leave to prove for a couple of hours in a really warm place. This is essential.
- when ready to cook, pin them out quite thin. A thick naan won't work.
If you don't have a tandoor, use the technique described elsewhere on this forum of sticking them to a tawa over a high flame, waiting for the to bubble up, and then turning the whole thing upside down over the flame. Don't be afraid of blackening the naan in places - this is a sign that it has reached the required temperature.
Cheers,
Tim