Italian plum tomatoes, also called Roma tomatoes, have less moisture and more concentrated flavor than conventional tomatoes. Thus, plum tomatoes are chosen for commercial tomato paste. Plum tomatoes make a great pizza topping because they add lots of tomato flavor with little juice so the crust stays crisp.
Try Moroccan olives on this pizza. Moroccan olives are small but rich oil-cured black olives.
This pizza has a tender potato crust that is less sturdy than traditional bread crust, so it's best to eat it with a knife and fork.