Sift the wheat flour into a bowl. Add the salt and mix well. Pour the hot water into the flour and knead until a soft dough forms that does not stick to your palms.
Transfer the dough to a cellophane bag and let it rest for 2 hours. You can also let it rest overnight if preferred.
Divide the dough into small balls. On a flour-dusted surface, roll each ball into a flat cake about 5 mm thick.
Heat a frying pan over medium-high heat without adding oil. Place a cake in the pan and fry until golden brown, then flip and fry until golden brown and puffed.
Serve the chapatis with filling if desired, placing it inside the puffed cake.