Set the oven temperature to 392 °F / 200°C.
In a large mixing bowl, beat the oil and sugar together for about two minutes. Add the eggs, one at a time, beating well after each addition, until the mixture is a pale yellow color.
Add the zest, the baking powder, baking soda, yogurt, and milk and mix until everything is well combined.
Using a silicone spatula, gently fold in the crushed phyllo dough, a handful at a time. Do not add the phyllo dough all at once.
Spread the batter evenly in the prepared pan and bake for 30-35 minutes, until it becomes golden brown.
When done, take it out of the oven and immediately poke the entire cake with a toothpick or souvlaki skewer and pour the orange syrup over it, one ladle at a time.
Let it cool completely before cutting or adding the chocolate ganache (at least an hour). Refrigerate.