1In food processor, place vegetable mix. Cover; process with 8 to 10 on-and-off pulses until finely chopped. Stir in olives and dressing.
2Spread 1 heaping tablespoon vegetable mixture over cut side of each roll bottom. Top each with 1 half slice Swiss cheese, 1 ham slice, 1 salami slice and 1 half slice provolone cheese; cover with roll tops. Serve immediately, or wrap in plastic wrap and refrigerate until serving time.