Sift the dry ingredients together 3 or 4 times to ensure they are evenly mixed. Place in a large mixing bowl and make a well in the centre.
Add the oil and water and gradually mix the dry ingredients into the liquid to form a stiff dough. Knead the dough into a smooth ball.
Roll out the dough on a well floured surface (use extra cornflour) as thinly as possible. This dough is very fragile so the use of a pasta machine is not recommended. Cut into noodles, and chill until ready to use.
To cook - add the noodles to boiling salted water and cook for 8 -10 minutes.