best focaccia recipe

Ingredients: 4 cups (500 grams) all-purpose flour 1 1/2 cups (360 ml) warm water 1 packet (2 1/4 teaspoons) active dry yeast 1 teaspoon sugar 1 teaspoon salt 1/4 cup (60 ml) extra-virgin olive oil, plus more for drizzling Fresh rosemary, sea salt, and/or other herbs and toppings (optional)