Mix water, yogurt and melted butter & add to the Naan premix and work together.
Knead for 10 minutes, until smooth.
Oil a bowl well, and place dough in a warm area for 90 minutes, or until doubled in size.
Knead again just for a minute, and divide into 8 balls, and roll out into shape.
Heat up a heavy based pan (with a lid) - until nice and hot. Do not add any oil or butter. Place as many naan in the pan that will fit comfortably. Close the lid. Give it a a minute - then flip over , brush melted butter over the naan.and cook for another minute. The naan should puff up, and form nice bubbles. (then you know its hot enough)
Place cooked naan in a casserole, lined with a tea towel, and brush other side of each naan with melted butter. Cover with tea towel, and continue with the rest of the naan. Keep covered, and even closed to maintain heat and allow naan to steam. (will soften)