Sift the wholewheat flour and refined flour with salt into a bowl and set aside. Blanch spinach leaves in boiling water for one minute. Drain, squeeze out the excess water and blend to a thick purée. Add spinach purée and sesame seeds to the flour and knead with enough water into a soft dough.
Cover the dough with a damp cloth and set aside to rest for half an hour. For the stuffing, mix paneer, green chillies, coriander leaves, onion, chaat masala and salt in a large bowl. Divide into eight equal portions. Knead the dough again and divide into eight equal portions.
Shape into balls and press between your palms. Roll out each ball into a four-inch round and thin down the edges. Place one portion of the stuffing in the centre and gather the edges together and shape into a ball again. Roll out into a seven-inch parantha.
Heat a tawa. Place each parantha on it, turn over once and drizzle a little melted ghee around it. Turn it over again and spread a little more ghee on the other side. Cook till both sides are cooked.