In a small bowl combine ½ cup of warm water and 2 tbsp of active dry yeast. Let sit for 5-10 minutes until foamy.
In a large bowl, combine flour and salt.
To the same large bowl, add in 2 cups of water, yeast mixture, and a generous drizzle of olive oil. Mix until a sticky moist dough forms.
Cover the bowl with saran wrap and place in the fridge overnight.
When the dough has risen, scrape down the sides to form a ball using a spatula. You want to move it around a little, but no need to knead it or over-mix.
Prepare a 9x17 baking sheet by drizzling olive oil and smearing it all over to avoid sticking.
Transfer the dough onto the sheet, drizzle with olive oil, and gently pull and tug it into a flatter shape (it does not need to reach the edges of the pan), but just enough so it starts relaxing it's way towards the edges.
Let rest for 1 hour.
Preheat oven to 450℉.
Squish the dough out into the desired shape using your fingers. Don't be afraid to create. dimples. If you feel you've overdone it with the squishing (dimples are more than 1/2" to one another, allow the dough to rest for another 15 minutes before proceeding.
Tear off little bits of rosemary and spread out onto the dough. Drizzle some olive oil again, and sprinkle with sea salt (and pepper - optional).
Bake for 20-25 minutes, until the edges are golden.
Let rest for 10 minutes, and enjoy!