Prepare the baking pan by generously coating it with non-stick oil spray.

In a large mixing bowl, combine all-purpose flour, olive oil, salt, instant dry yeast, and warm water. Use an electric mixer on low speed for about 60 seconds until a shaggy dough forms.

Transfer the dough into the prepared pan, spread it evenly, cover lightly with plastic wrap, and let it rise at room temperature for one hour.

Preheat the oven to 375°F about 30 minutes into the rising process.

After an hour, gently press your fingertips into the surface of the dough to create dimples, drizzle with olive oil, and sprinkle optional dried rosemary and flaky salt.

Bake the dough in the preheated oven for 28-30 minutes until golden-brown.

Allow the focaccia to cool in the pan for 5 minutes, then transfer it to a wire rack to cool slightly before serving.