La Rosa is an unassuming hole-in-the-wall pizzeria on the bustling corner of Broad and Snyder in Philadelphia, next door to a check-cashing place. There are no chairs and no menu. Pick up, delivery, or just eat at the counter. They make square pan pizzas and sometimes calzones and panzarotti. No wings, salads, or sandwiches. Nothing too fancy, except for this amazing potato pizza that's one of my favorite slices in the city.