Prepare the filo sheets and leave them to rest. 

Beat the eggs thoroughly and add the milk. 

Cut the cheece into chunks. 

Place the larger filo sheet on the oiled baking tray and pull it up on the sides to cover those as well as the pie. 

Oil and butter the sheet well and using a ladle pour some from the egg and milk mixture while spreading some of the cheese as well. Repeat the process to the last sheet. Then roll the initial sheet inwards and place the last of the filo, also rolling it inwards. 

Brush with butter and egg so that it crusts, sprinkle with a bit of water and score it with a fork in a couple of places. 

Bake over medium heat for about 1 hour, making sure that the pie separates from the sides of the baking tray.