Then add the potatoes, zucchini and mizithra in layers. Add some salt, pepper, mint, kasseri and a little EVOO. Repeat the layers. Beat the eggs with the milk and pour over the filling (reserve a tiny bit of the mixture to glaze the top of the pie). Then put the other pastry sheet on top of the filling, glaze with some of the egg/milk wash, sprinkle with sesame seeds. Cut the top layer of pastry into squares, place in a preheated oven at 180C and bake for around 1-1/2 hours until golden brown and the filling is cooked through.