In a large bowl, add the mayonnaise, Parmesan cheese, red wine vinegar, and buttermilk to a mixing bowl.
Add the cracked peppercorns, Italian seasoning, salt, and garlic seasoning.
Whisk everything together until it all blends and becomes a smooth and delicious combination.
Taste and adjust seasonings if desired.
Serve this immediately or refrigerate until ready to use.
