We love pork in all its glorious forms. And we love pork sandwiches in all their glorious forms: the bacon on a BLT, pulled pork on a barbecue sandwich, ham (where would any of us be without the ham sandwich?).
But it's hard to dispute the superiority of porchetta. It's an Italian preparation where the pork is covered in garlic, spices and herbs, then roasted until succulent—stick it on bread, and you've got a sandwich for the ages.
The bread: A crusty roll is the ideal vehicle—better for soaking up all those porky juices.