Start by washing and drying the romaine lettuce thoroughly, then chop it into bite-sized pieces. Slice the red onion very thin—this keeps the flavor from overpowering the salad. Cut the Roma tomatoes into wedges or half-moons for even distribution. Drain and rinse the olives, and set aside all ingredients for easy access.
In a large bowl, combine the chopped romaine, sliced onions, black olives, and tomatoes. Add the pepperoncini whole or sliced, depending on your spice preference. If using parmesan cheese, sprinkle it evenly at this stage. Pour in the Italian dressing—start with ¼ cup and add more if desired.
Using tongs or salad servers, gently toss the salad until all ingredients are well coated with dressing. Just before serving, add the Olive Garden croutons to maintain their crunch. Serve immediately to enjoy the crisp, fresh texture. This salad pairs perfectly with pasta, grilled chicken, or soup.