Make the dough according to the recipe for pizza, up to the point at which the first rising is complete.
While the dough is rising, combine the olive oil, salt, chopped garlic, and sage leaves. Place equal amounts in 2 medium-sized bowls and set them aside.
Turn out the risen dough onto a well-floured worktable and divide the dough in half. The pieces will be wet and sticky, but use a little extra flour and round them up into tight balls. Place each piece in a separate bowl. roll the dough balls around in the oil mixture and set them aside, still in the oil, to rise for between 3 and 4 hours. The dough will have almost tripled in size and be very soft and airy.
Remove the balls of dough from the oil and transfer them onto large cookie sheets that have a rim at least 1/2 inch high. With the palms of the hands and with your fingers open wide, spread the dough out to about 12 inches by 18 inches, and about 3/8 inch thick. The dough may spring back. If so, let it relax for a few minutes, then repeat the stretching process. Pour the remaining oil, along with the sage, garlic, and salt over the top of the dough.
Set the focacce aside, covered, to rise for 1 hour. When they have risen, poke the dough with the fingertips several times and bake in a 400 degree oven for between 15 and 17 minutes, or until they are golden brown.
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