Combine the yeast and water, stir, and leave for 15 minutes to dissolve.
Mix the flour and salt in a large bowl and make a well in the center.
Stir in the yeast mixture and 4 tbls of the the oil. Stir from the center, incorporating flour with each turn, to obtain a rough dough.
Transfer to a floured surface and knead until smooth and elastic. Cover and leave to rise in a warm place until doubled in volume, about 2 hours.
Preheat the oven to 400 degrees and place a baking sheet int he center of the oven.
Punch down the dough. Roll to a 12 inch circle, leave to let rise slightly.
Dimple the surface all of with your finger. Drizzle the remaining oil on top. Slide a floured board under the bread, carry to the oven, and slid onto hot baking sheet.
Bake until golden brown about 35 minutes. Cool on rack.