In a stand mixer, combine instant yeast, sugar, and water. Allow to rest for a few minutes until yeast begins to foam.
Add the bread flour, extra virgin olive oil, and sea salt.
Using the dough hook, knead the dough for about 5 minutes.
Cover the bowl and rest the dough for 15 minutes.
After the 15 minute rest, add the garlic and rosemary and knead the dough again, this time for only 2 minutes.
Repeat the 15 minute rest, 2 minute knead 3 more times.
After the dough has been kneaded 5 times, cover the bowl and allow to rise for 1 hour.
Prepare the 8x8 square pan by greasing it with 1 tbsp of extra virgin olive oil. This will look like a lot of oil, but some of it will absorb into the dough.
Drop the dough into the prepared pan and gently push it to the corners to fill the entire pan.
Cover with plastic wrap and allow to rise for 90 more minutes.
Preheat the oven to 475℉.
Brush 1½ tbsp of extra virgin olive oil over the top of the risen dough and create dimples in the dough with your fingers.
Sprinkle the coarse sea salt over the top of the dough.
Bake the focaccia in the preheated oven for 20 minutes or until the center of the bread is 200℉.
Allow the bread to cool for 10 minutes before removing to a cooling rack.