1. In a large bowl, mix together the flour, yogurt, baking powder, and salt until a soft dough forms.
2. Divide the dough into four equal parts and roll each into a ball.
3. On a floured surface, roll out each ball into a flat round shape.
4. Heat a non-stick skillet over medium heat and add olive oil.
5. Cook each flatbread for about 2 minutes on each side, or until golden brown.
6. In a small bowl, mix together the melted butter, minced garlic, and chopped parsley.
7. Brush the garlic herb mixture over the warm flatbreads before serving.