Focaccia

Name: Focaccia
Prep time: 15 min
Cook time: 25 min
Total time: 2 h 45 min
Yield: 12
Ingredients: Ingredients; 4 cups all-purpose flour; 1 1/2 cups warm water (110°F/45°C); 1 packet active dry yeast (2 1/4 tsp); 1/4 cup olive oil, plus more for brushing; 2 tsp salt; 1 tsp sugar; 1 tbsp fresh rosemary, chopped (optional); Coarse sea salt for sprinkling