In a small bowl or the measuring cup combine the warm water, sugar and yeast. Let stand until the yeast bubbles this can take 5-15 minutes. If it doesn't bloom/bubble start over.
Once ready add the flour, kosher salt, ½ cup olive oil into the yeast mixture. Using the dough hook mix on low until combined. Once the dough has come together and released from the sides. Continue to knead on medium speed for 5-6 minutes. If the dough is too sticky add a small amount of flour so you can handle it.
Transfer to a clean, lightly floured surface and knead a couple of times, if it is still too sticky sprinkle with a little flour. Add a little olive oil to coat the bowl and add the dough back into the bowl to rise. Cover with plastic and put it in a warm place to allow it to double in size. This takes about an hour.
Coat your jelly roll pan with the other ½ cup of olive oil - if you are worried about it being too much, you can add less but you are making focaccia which is an oily crusty bread - just saying!
Add the dough to the pan and start pressing it so it fits into the pan. Flip the dough to make sure that the oil gets over all of it. Continue to work the dough in the shape of the pan. Using your fingers to make dents into the dough. I didn’t make actual dimple holes in the dough but I will the next time. Mine has dimples but they are not as defined as if I actually made the holes.
Place the tray in a warm place until it has doubled in size, which should take an hour. About 30-45 minutes in preheat your oven to 425’F.
Liberally sprinkle the top with some coarse salt and then lightly drizzle a little more olive oil on top. Bake for 20-30 minutes until the loaf is golden brown. Remove from the oven and let it cool before cutting