01 - In a large bowl, mix bread flour, instant dry yeast, and fine sea salt until evenly distributed.
02 - Add warm water and extra virgin olive oil to the dry mixture and stir until a sticky dough forms.
03 - Knead dough on a lightly floured surface for 8 to 10 minutes until smooth and elastic, or use a stand mixer with a dough hook for 6 to 8 minutes.
04 - Place the dough in a lightly oiled bowl, cover with plastic wrap or a damp towel, and allow to rise in a warm area for 1 hour until doubled in size.
05 - Lightly oil a 9x13 inch baking pan. Transfer dough into the pan and gently stretch it to fit the shape.
06 - Cover the dough and let it rise again for 30 to 40 minutes until puffy.
07 - Preheat oven to 425°F.
08 - In a small bowl, combine extra virgin olive oil, minced garlic, and chopped rosemary.
09 - Using fingers, create dimples across the dough surface. Evenly drizzle garlic-herb oil over the dough, pressing oil and herbs into the indentations, then sprinkle flaky sea salt on top.
10 - Bake in the preheated oven for 22 to 25 minutes until the focaccia is golden brown and crisp on top.
11 - Allow the bread to cool slightly before slicing and serving.