Best I've tried was in Naples.
I've worked (twice over the years) for an Italian firm where most of the staff were Sicilian or Calabrian. The pizza in the canteen (these were 24/7 on site or at sea jobs) was so nice I nearly went weak at the knees every time they had it in the menu. Thing was, they only had it twice a week at the recommendation of the company/ship's doctor since many of the staff were male and of the heart attack age.
They also had unlimited help yourself gelato. One of the staff was from a family with a chain of gelato shops in (I think) Sicily. I went up two trouser sizes working there. The it's,Ian's often made an espresso and put a huge dollop of ice cream in. Works well.
Zapiekanka like it used to be in Warsaw and still is in a lot of places is just like Findus French Bread Pizza only worse, with swirls of ketchup, bottled mayo and limp gherkin slices. A good one is really good though and some of the fancy ones like Zapiexy mentioned above are pretty good. Better bread, jalapeños, a few fancy things.
I saw a recipe today for a Spanish mini pizza, sort of between zapiekanka and pissaladière. I'll try it in the week.
Maybe worth having a recipe thread. Some Polish recipes (adapted where necessary to ingredients overseas) and non-Polish dishes that can either be adapted for ingredients here or which would suit Polish tastes. It's sometimes a surprise which dishes from abroad go down well here and which ones don't.