Place the parsley, garlic, Greek yogurt, lemon juice, extra virgin olive oil, apple cider vinegar, salt, pepper, and red chili flakes into the bowl of a food processor.
Pulse a few times until the sauce is well blended but still slightly textured. Scrape down the sides as needed. Do not over-blend.
If desired, add the teaspoon of honey and pulse once or twice to incorporate.
Taste and adjust with additional salt, lemon juice, olive oil, or red chili flakes to suit your preference.
Use immediately or refrigerate for 10–15 minutes to allow the flavors to meld before serving.