In a large bowl, combine the flour and salt. Create a well in the center of the mixture and add in the egg. Slowly pour in the water and mix well (I find chopsticks to be a really good way to mix the ingredients in order to cover the flour with the egg and water). If the mixture is too dry, add more water. If it’s too wet, add more flour. Begin using your hands until a pliable dough has formed.
On a lightly floured surface, knead the dough for around 5 minutes or until elastic. Place the dough back into the bowl and cover with a damp cloth for at least 10 minutes.
Cut the dough into four equal pieces. Using a rolling pin or a dough rolling machine, roll out the pieces until they’re around 3mm thick. Cut the dough into 3 inch squares.