Gather your small mixing bowl, whisk, measuring spoons, and spatula so everything is within reach.
Pour the Greek yogurt into the bowl, then add a teaspoon of freshly squeezed lemon juice. Whisk together until the mixture is smooth and slightly tangy-smelling, about 30 seconds.
Finely chop the fresh dill and chives, then stir them into the yogurt mixture. The herbs should be vibrant and fragrant, giving the dressing a bright appearance.
Mince the garlic clove finely and add it to the bowl, stirring to distribute evenly. You should smell a fresh, pungent aroma as you mix.
Pour in one to two teaspoons of buttermilk or milk to loosen the dressing. Whisk again until it reaches your preferred consistency—smooth and pourable but not watery.
Season with salt and freshly ground black pepper. Start with ¼ teaspoon salt and a few cracks of pepper, then taste and adjust until the flavors are balanced and lively.
Let the dressing sit in the fridge for about 10 minutes to allow the flavors to meld and intensify. Give it a quick stir before serving.
Serve chilled as a dip for veggies, drizzle over salads, or use as a flavorful marinade for grilled chicken. Enjoy the creamy, tangy goodness!