Whisk oil, vinegar, garlic, salt and pepper together in a small bowl.
Pour evenly over the tomatoes.
Cover and let stand at room temperature for at least 2 hours (and up to 4 hours).

Before serving, sprinkle with Parmesan and parsley.
Tips
To make ahead: The tomatoes can marinate at room temperature for up to 4 hours.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.