Gather all ingredients: parsley, oregano, garlic, red pepper flakes, olive oil, and red wine vinegar.
Finely chop the parsley and oregano, ensuring no large pieces remain.
Mince the garlic cloves to release their flavor.
In a mixing bowl, combine chopped parsley, oregano, and minced garlic.
Add red pepper flakes to the herb mixture for a touch of heat.
Pour in the olive oil, mixing thoroughly to integrate the flavors.
Add red wine vinegar to provide acidity, enhancing the overall taste.
Season with salt and pepper to taste, adjusting as necessary.
Let the sauce sit for at least 10 minutes to allow flavors to meld.
Serve immediately or store in the refrigerator for up to one week.