In a large bowl, combine the warm water and yeast. Let it sit for 5–10 minutes until foamy.
Add the flour, olive oil, The Holly Tree Organic Italian Seasoning, The Holly Tree Organic Black Pepper Powder, and Salt. Mix until a soft, sticky dough forms.
Knead the dough for 8–10 minutes until smooth and elastic.
Place the dough in a lightly oiled bowl, cover, and let it rise in a warm place for 1–1½ hours, or until doubled in size.
Grease a baking pan with olive oil and gently press the dough into the pan, stretching it toward the edges. Cover and let it rise again for 30 minutes.
Preheat the oven to 425°F (220°C).
Using your fingertips, press dimples all over the surface of the dough. Drizzle generously with olive oil and sprinkle with flaky sea salt. Add fresh rosemary if desired.
Bake for 20–25 minutes, or until the focaccia is golden brown with crisp edges.
Remove from the oven and brush lightly with a little more olive oil while still warm. Allow to cool for a few minutes before slicing.