Savory Veggie and Cheese Flatbread Recipe

Ingredients:
1 cup all-purpose flour
1/2 cup yogurt (plain Greek or regular yogurt)
1/4 cup melted butter or olive oil
1 teaspoon baking powder
1/2 teaspoon salt
1/4 teaspoon black pepper
1/2 cup shredded cheese (cheddar, mozzarella, or a mix)
1/2 cup finely diced vegetables (such as bell peppers, green onions, or zucchini)
1 tablespoon fresh herbs (like parsley or chives, optional)
1 tablespoon sesame seeds or nigella seeds for garnish
1 egg, lightly beaten (for egg wash, optional)
Instructions:
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