Combine the warm water, yeast and sugar in a large bowl. Stir in the oil, then half the flour. Mix in the rest of the flour, reserving 1/2 cup.
Sprinkle the 1/2 cup of flour onto a clean work surface. Tip the contents of the bowl out onto the floured work surface and knead for 5-10 minutes until it's smooth and you've kneaded in all the flour.
Lightly grease the bowl with some oil, put the dough into the bowl, cover with a clean dish towel. Leave in a warm place (see notes) to rise until doubled in size (around 1 hour).
Once risen, lightly sprinkle a work surface with some flour (you can use all purpose flour for this). Tip the dough out and roll it into a 28" by 12" rectangle (it'll be thin!).