Beat together the yogurt and egg. Whisk together the flour, sugar, baking powder, baking soda and salt. Add the chopped or grated cold butter and combine. Add yogurt.
Move to a lightly floured flat surface and pat into a large rectangle, then gently roll out with a floured rolling pin to an 11×8 inch rectangle.
Spread the top of the dough with the apricot jam and sprinkle with 3/4 of the nut mixture.
Roll up from the long end and pinch the edges to seal the dough. Cut into 9 -12 slices depending on the pan used.
Arrange the slices cut side down on the prepared pan and sprinkle with the remaining nut mixture. Bake in the pre-heated oven until golden.