Begin by preparing the salad mixture. In a large mixing bowl, combine the shredded lettuce, diced tomatoes, shredded carrots, diced cucumber, roasted red peppers, sliced black olives, and sliced pepperoncini.
In a separate small bowl, mix together the mayonnaise, Dijon mustard, Italian seasoning, and a pinch of salt and pepper to create a creamy dressing.
Pour the dressing over the salad mixture and gently toss everything together until all the ingredients are evenly coated.
Slice the sub roll or hoagie bread horizontally but not all the way through (create a hinge).
Generously fill the bottom half of the bread with the salad mixture, pressing it down lightly so it stays in place.
Close the sandwich and slice it in half, if desired.
Serve immediately with a side of crispy French fries or potato chips for a classic touch.
Notes
Serve with crispy French fries or potato chips for a classic touch.