The classic New Orleans sandwich makes for great snack-size sliders!
Pulse the pickled vegetables in a food processor until they're finely chopped. Stir the olives and dressing into the resulting mixture.
Spread 1 heaping tablespoonful of the pickled veggie mixture over the cut side of each roll bottom. Top each with 1 Swiss cheese slice half, 1 ham slice, 1 salami slice, 1 provolone cheese slice half, and the roll tops. Serve immediately, or cover them with plastic wrap and let them chill until ready to serve.