Scallion and Chive Flatbread

Ingredients

• 3½ cups (420g) all-purpose flour
• 1 tablespoon granulated sugar
• 2 teaspoons instant yeast
• 1 teaspoon fine sea salt
• ½ teaspoon freshly ground black pepper
• 1¼ cups (282g) warm water, or as needed
• 3 tablespoons extra-virgin olive oil, plus more for greasing pan
• 3 tablespoons unsalted butter, melted
• ⅓ cup (about 15g) finely grated Parmesan cheese
• 1 bunch (about 135g) scallions, ends trimmed
• ½ bunch (about 25g) fresh chives
• Flaky sea salt, as needed for finishing
• Edible flowers (optional), for finishing