Preheat oven to 180 degrees. Line a tray with parchment paper and set aside.

In a bowl, sift together all the dry ingredients (from flour to cinnamon powder)

Grate the butter into the flour and rub it in to resemble bread crumbs.

Add the grated apple and walnuts and mix well. Squeeze with hands so that the apple releases its fluid into the dough.

Add 2 tbsp yogurt and bring the dough together. Use more as required to just bring it together - do not knead.

Pat onto the prepared tray and shape into a round. Cut into six wedges.

Bake for 20 minutes for soft or 25 minutes for crispier.

Cool slightly and serve.