1. Crinkle phyllo dough sheets and bake at 250 F for about an hour until crispy;
2. To make the batter beat eggs with sugar, vanilla, orange zest, then add yogurt and gradually pour the oil and squeeze the orange juice;
3. Once the phyllo sheets have cooled enough to handle- crush them into the batter, add baking powder and mix until well incorporated;
4. Grease your casserole dish and pour the mixture over, top with orange slices and bake at 350 F for about 30 mins;
5. Meanwhile make the syrup by mixing water, sugar, orange zest and juice; bring to boil and set aside;
6. Once cake has cooled down a bit, pour the syrup over and you can enjoy immediately or let it soak before slicing into it!
