Banitsa with Spinach

Ingredients

 * 1kg flour,
 * 1kg spinach, 300g.
 * white brined cheese,
 * 3/2 cupful of yoghurt,
 * 200g butter,
 * 1 spoonful sunflower oil,
 * 1 spoonful vinegar,
 * salt

Directions

 * 1) Cook the cleaned and finely cut spinach in some of the butter.
 * 2) After having cooled, stir in crumbled cheese and yoghurt.
 * 3) Knead a hard dough from the flour, oil, vinegar, salt and water.
 * 4) Roll into five sheets (1kg of ready rolled pastry sheets may also be used).
 * 5) Line a baking dish with butter, place 1 sheet on the bottom and top with the spinach filling.
 * 6) Add a second sheet, filling and so on.
 * 7) Baste in a moderate oven.
 * 8) The same recipe may be used for making banitsa with leeks.