Slice the sub rolls in half lengthwise and lightly toast them in the oven at 350 degrees Fahrenheit for 3-4 minutes until slightly crispy. Set aside.

Take the salami, ham, and provolone cheese and chop them into small bite-sized pieces, about half-inch cubes. Place them in a large mixing bowl.

Add the shredded lettuce, halved cherry tomatoes, diced red onion, and chopped pepperoncini peppers to the bowl with the meats and cheese.

Pour the Italian dressing over all the ingredients in the bowl. Using tongs or two large spoons, toss everything together until well combined and evenly coated with dressing.

Open the toasted sub rolls and generously pile the chopped mixture onto the bottom half of each roll, distributing evenly among the four sandwiches.

Top with the other half of the roll and press down gently. Cut each sandwich in half if desired and serve immediately while the bread is still warm and crispy.