½ teaspoon ground black pepper, or more to taste (Optional)
Instructions
Pour olive oil, 1/2 cup plus 2 tablespoons vinegar, Parmesan cheese, mustard, oregano, basil, onion, garlic, salt, sugar, and black pepper into a large glass jar. Whisk or stir with a spoon until well combined.
Refrigerate dressing for at least 2 hours. Shake very well before serving.