Gratin di patate filanti - grated potatoes cake with ham and mozzarella

This is a very easy 'experiment' I did the other day as I ran out of ingredients for my dinner, but I can guarantee the result was appreciated by Matt as all he could say while eating was: '..hmmm...delicious!' and that kept me smiling as I totally improvised this out of desperation caused by a lack of food in the fridge.
I took some inspiration to it  from the neapolitan gatto' (gateau, one of the many french influences in our neapolitan dialect), though very different as in gatto' the potatoes shoud be mashed and there's also eggs and other ingretients in it... so I named this one ' Gratin di patate filanti'. Here's what I did:

Ingredients for 2/3 persons:
4-5 medium potatoes
100 gr ham (cured)
50 gr parmesan cheese grated
bread crumbs
half glass of milk
120 gr mozzarella cheese sliced 
butter 
pepper 
salt 

I boiled and peeled 5 potatoes
sliced them and placed them in a pre-greased oven tray (I used a pyrex one), and made different layers with
potatoes
ham
mozzarella slices
sprinkled parmesan
and so on until the ingredients are all in the tray

In order to make the outside of the bake crispy and nice I covered it with some bread crumbs and butter flakes  and just a little bit of milk all over the top ...bake in the oven for 30 minutes ...

and this is the result (courtesy of Matt's plate above...) you can also serve it as a side dish for some oven roasted chicken I think, but it's filling enough to be served as a main course! Buon appetito!