Bourek au fromage et aux olives noir | Algerian savoury pastry with cheese and black olives

Name: Bourek au fromage et aux olives noir | Algerian savoury pastry with cheese and black olives
Cuisine: European, Mediterranean, French, African
Ingredients: 12 boureks; 6 leaves of douel (brik); 200g - 8oz cream cheese like La Vache Qui Rit or Philly; 120g - ½ cup pitted and chopped black olives; 1 egg, lightly beaten; oil (for frying); salt; Salt right after frying or baking.