Activate the yeast in a mixing bowl, combine warm water, active dry yeast, and honey (if using). Stir gently and let sit until foamy, about 5–10 minutes.
Make the dough add bread flour and sea salt to the yeast mixture. Stir until a sticky dough forms.
First rise drizzle olive oil over the dough, cover with a damp towel or plastic wrap, and let rise in a warm place until doubled in size, about 1–1½ hours.
Prepare the pan and oven preheat the pizza oven to 450–500°F (230–260°C). Generously oil a cast iron skillet or shallow baking pan.
Second rise transfer the dough to the oiled pan, gently stretch it to fill the pan. Let it rise again for 20–30 minutes.
Top and dimple using your fingertips, press dimples all over the dough. Drizzle more olive oil, then sprinkle with rosemary and flaky sea salt.
Bake in the pizza oven for 15–20 minutes, rotating as needed, until the focaccia is golden brown and crispy.
Cool and serve let cool for 10 minutes, then slice and serve warm.