Combine all ingredients in a small bowl. Taste and adjust seasoning. Remember that the sauce will intensify in flavor as the garlic marries with the Greek yogurt and lemon juice.
Refrigerate for 15 minutes and re-taste.
Garnish with more fresh herbs. Serve with falafel pitas, salad and hummus.
Notes
If the sauce is very thick, add a tablespoon of water to thin out the shawarma sauce to the right consistency before serving.