Preheat oven to 220°C (425°F) and line a baking sheet with parchment paper.
In a medium mixing bowl, combine the fat-free Greek yogurt, self-rising flour, and salt until a rough dough forms.
Transfer the dough to a lightly floured surface and knead for approximately 2 minutes until the texture is smooth.
Divide the dough into two equal portions and roll each into a thin oval shape about 0.5cm thick.
Place the flatbreads onto the prepared baking sheet, brush with olive oil, and bake for 6 minutes.
Remove the flatbreads from the oven and spread 30g of cranberry sauce over each base.
Layer the brie cheese slices over the cranberry sauce and return to the oven for 5 to 6 minutes until the cheese is melted and bubbling.
Garnish with fresh arugula and a drizzle of balsamic glaze before serving.