How to make
Boil the potatoes and cut them into slices.
In an oiled tray, arrange a layer of potatoes, layer of crumbled feta and potatoes again.
Beat the eggs with the milk and pour them over the potatoes.
You can also add a little salt to this topping.
Add the butter at the very top. Bake in a 390°F (200 °C) oven about 30-40 min.