This party-ready dish hits all the right notes—bready, fatty, pickle-y—in a single bite-sized portion, delivering maximum satisfaction with the least amount of friction.
Holding a bread knife parallel to a cutting board, slice focaccia in half. Spread cut sides with mayonnaise and cut each half into 2" squares. Working one at a time, drape mortadella onto squares, top with pepperoncini, and secure with skewers.