Mix the Base: In a small mixing bowl, combine the Greek yogurt, Dijon mustard, and whole-grain mustard. Stir until fully blended.
Add Flavor Enhancers: Whisk in honey, apple cider vinegar, garlic powder, onion powder, salt, and black pepper until the mixture is smooth and well combined.
Incorporate the Oil: Slowly drizzle in the olive oil while whisking to create a slightly richer texture.
Finish with Herbs: If using fresh dill or parsley, stir it in at the end to add a burst of freshness.
Chill and Serve: Let the sauce sit in the fridge for at least 10 minutes to allow the flavors to meld, then serve cold with grilled meats, sandwiches, roasted vegetables, or as a dip.
