For us silly people.. ALX how hot is an oven set at 4?
I bake mine for about an hour at 350...
I put down a layer of sliced potatoes
sprinkle with ham, diced onion, salt, pepper, cheddar cheese, and a little flour.
then dot with butter
Another layer of sliced potatoes
Another layer of ham, onion, salt, pepper, cheese and flour, dot with butter
Another layer of potatoes, cheese, salt, pepper, flour, dot with butter. ( can add more ham if you want)
Add some milk...
cover and bake for 45 minutes
uncover test potatoes for softness
if they are soft I top them with a mixture of cheddar and swiss cheese
and bake again until cheese is nice and melted.