What are the authentic traditional ingredients for Naan bread? I would like to know what the authentic and traditional ingredients for Naan bread are. There are many recipes that use some ingredients but not others and the cooking method are not always the same. These are the ingredients which usually differ from what I have seen:


Milk
Yogurt
Water
Baking Powder
Yeast
Eggs


This recipe here does not use yogurt, this one here uses no baking powder or milk or yogurt, this one here uses no baking powder or yogurt. I can understand substitutions and variations, but I would like to know how it is originally made and what the ingredients are.

Also the cooking method varies. Some use a pan to fry the Naans prepared, some use only the oven, and some use the oven and then are grilled at the end for a short time.
Naan traditionally is plain flat bread made using bread flour, Yeast, salt and water. Its cooked in tandoor.

Salt could be optional if you are having naan with a curry. (Cause curry usually has salt and the bread might not need it).

Variations like milk or yogurt is used instead of water to make dough soft and fluffy. This would change the texture and flavor of the bread.

It is possible to use baking powder instead of yeast, because they both act as a leavening agent. Don't use them together. 

IMHO eggs are not part of the traditional naan ingredients.