In a small jar or bowl, combine all of the dressing ingredients and whisk (or shake) to combine.
In a large bowl, combine the lettuce, green onions, and chopped olives. Drizzle the dressing over the lettuce and toss until well coated and combined.
To serve, divide the salad among 4 shallow bowls. Garnish with 1 to 2 pepperoncini, a few whole olives, and more grated Parmesan cheese.
