Start kneading the dough and keep adding the remaining flour. Knead for about 8 minutes then place the dough in a oiled bowl and let the dough rest in a warm place for about 30 to 40 minutes. You can use your mixer, instead of kneading.
In another big bowl mix the flour with the salt. Gradually add the flour to the yeast mixture and whisk until the dough gets thick enough that you cannot whisk anymore. Remove the whisk and turn the dough over onto a floured surface.
I started off by proofing the yeast, so in a big bowl add the lukewarm water, sugar and yeast. Whisk well. Add ½ cup of the flour to the yeast mixture and whisk well. Let the yeast activate for about 10 minutes. It should bubble up and rise. Add the oil to it and mix.