Add the yogurt, garlic powder, onion powder, parsley, chives, dill, lemon juice, salt, pepper, mustard, and olive oil, if using, to a mixing bowl and whisk well. Add 1 tablespoon of water, if needed, to help thin the dressing.
Transfer the dressing to a storage container with a lid and store in the fridge for at least 2 hours to chill, to let the flavor fully develop. Then serve with your favorite sliced veggies or pour over a salad. Leftovers can be stored in an airtight container in the fridge for up to 5 days.
Notes
Nutrition information is for roughly 2 tablespoons of dressing. This information is automatically calculated, and is just an estimate, not a guarantee.