Mix 1/2 cup warm water, sugar and yeast

Let the yeast proof for 5 mins

Add flour, curd, salt to the yeast mixture

Knead soft dough by adding another 1/4 cup water

Let the dough proof at warm place for ~6 hours

After that divide the dough into 6-7 equal parts

Roll into oval shape

Apply water on one side of the naan

Cook on iron tawa the wet side down

Once you see bubbles on the top, flip it on to direct flame