PENNSYLVANIA: ROAST PORK SANDWICH -- Everyone knows about Philly cheesesteaks, but a handful of city sandwich shops up the ante with a similar-looking but more deluxe roast pork sandwich: moist, sweet meat forked from a drippy trough and piled into a seeded roll, supplemented by clumps of spinach or broccoli rabe sautéed in olive oil with plenty of garlic. Forget cheese; here, it is only a distraction.