Crisp Rosemary Flatbread

Bahan-bahan (4 porsi)

• 1 3/4 cups all purpose flour
• 1 tablespoon finely chopped fresh rosemary ((plus two additional sprigs))
• 1 teaspoon baking powder
• 3/4 teaspoon salt
• 1/2 cup water
• 1/3 cup olive oil, (plus more for brushing)
• flaky sea salt