Homemade Focaccia Bread

Bahan-bahan (15 porsi)

• 6 tablespoons olive oil (divided)
• 3 ⅓ cups all purpose flour
• 1 packet instant yeast (2 ¼ teaspoons)
• 1 ½ teaspoons granulated sugar
• 1 teaspoon salt
• 1 ⅔ cups warm water (110-115°F)
• kosher salt
• 1 tablespoon fresh rosemary (optional)