Boyus or Boyuz or Boyikus are spinach and cheese filled Sephardic pastry.  I have tried many recipes and I think at least three are archived on this blog in the recipe index.  Last week when I was researching and making strudel I had a thought.  Strudel dough is essentially like philo dough.  Nona says that her mother made her own philo dough for the boyus.  You see where I am going with this.  I made two batches of strudel dough and instead of butter for brushing the dough; I used olive oil for one trial and sunflower oil for the second trial.