Flatbread Pizza Recipe - How to Make Flatbread Pizza

Ingredients

• 2 c. all-purpose flour, plus more for surface
• 2 tsp. baking powder
• 1 tsp. kosher salt
• 1/2 tsp. baking soda
• 1 c. plain Greek yogurt
• 2 tbsp. olive oil
• Vegetable oil, for pan
• 12 oz. grape tomatoes, halved
• 1/4 small red onion, sliced
• 2 tsp. extra-virgin olive oil
• 2 tsp. freshly chopped oregano
• Kosher salt
• Freshly ground black pepper
• 8 oz. mozzarella, sliced into 1/4" thick rounds
• Balsamic glaze, for serving
• 2 c. arugula