In a mixing bowl, combine the romaine lettuce, cherry tomatoes, cucumber, red onion, pepperoncini, and black olives.

Pour the Italian dressing over the salad and toss well to combine.

Slice the sub rolls in half lengthwise.

Layer the salami, capicola, and provolone cheese on the bottom half of each roll.

Spoon a generous amount of the prepared salad on top of the meats and cheese.

Sprinkle chopped basil over the salad, then close the sandwich with the top half of the roll.

If desired, press the sandwich in a sandwich press or grill for a few minutes until warmed through.