11. For the dressing: Whisk together olive oil, vinegar, mayonnaise, Italian seasoning, garlic powder, corn syrup, salt, and pepper until well combined.
22. Transfer dressing to an airtight container and refrigerate for at least 4 hours.
33. When ready to serve, let dressing come to room temperature for 15 minutes.
44. In a large bowl, combine chopped lettuce, tomatoes, and red onion.
55. Add black olives and pepperoncini peppers.
66. Drizzle with desired amount of dressing and toss gently.
77. Top with croutons and freshly grated Romano cheese just before serving.