Mix all the ingredients for the filling in a bowl. Grease a 32 cm round pan and spread the half sheets, greasing them together.
Spread the filling and cover with the remaining leaves, oiling them as well.
Cut the pie into pieces, sprinkle with a little water and bake in a preheated oven at 170 degrees Celsius for about 50 minutes.
Tip: In the last 10 minutes of baking, put the pan in the last position of the oven to bake the bottom sheet properly.