Pie with layers of filo pastry, filled with feta cheese, eggs and butter

Name: Pie with layers of filo pastry, filled with feta cheese, eggs and butter
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: Greek
Ingredients: 4 eggs; 400gr filo pastry (usually one pack) around 16 filo sheets; 200gr / 1 cup plain yogurt; 150 gr / 1 cup of fat - equal parts of melted butter and sunflower oil (1/2 cup melted butter and 1/2 cup sunflower oil); 300 gr / 1 and 1/2 cups feta (white cheese); 10 gr / 1 and 1/3 tbsp baking powder