To activate the yeast, dissolve the sugar in the warm water (the water should be 110°F/ 43°C). Then add the yeast. Give it a quick stir, cover, and leave to activate. Between 5-10 minutes).
Once the yeast has proved in the warm water and sugar (it should look frothy). Gradually add in the flour, olive oil and salt.
Then knead for 5 minutes using the dough attachment on a stand mixer or knead the dough by hand.
First dough rise. Shape the dough into a ball and place it in a greased mixing bowl, and cover with a damp towel. Let the dough rest in a warm location for 45-60 minutes, or until it has doubled in size.
Second dough rise. Shape the dough into a large circle or rectangle so that the dough is about ½ inch thick. Cover with the damp towel and let the dough continue to rise for another 20 minutes.
Prepare the dough. Heat oven to 400°F (200°C). Transfer the dough to a large parchment-covered or oiled baking sheet (or press it into a 9 x 13inch (23cmx33cm) baking dish).
Use your fingers to poke deep dents ~ really deep. Press all the way down until you touch the baking sheet ~ all over the surface of the dough. Then drizzle a couple of tablespoons of olive oil with a clove of crushed garlic in it over the top of the dough, and sprinkle with the fresh rosemary leaves and sea salt.
Bake for 20 minutes, or until the dough is slightly golden and cooked through.
Remove from the oven and drizzle with a little more olive oil if desired. Slice and serve warm.