01 - Whisk together the mayonnaise, sour cream, and buttermilk in a medium bowl until the mixture is smooth and fully incorporated.
02 - Add the parsley, chives, dill, lemon juice, Dijon mustard, garlic, salt, and pepper to the bowl. Whisk vigorously until all ingredients are well combined.
03 - Taste the dressing and adjust the level of salt or pepper according to personal preference.
04 - Cover the bowl and refrigerate for a minimum of 30 minutes to allow the flavors to meld and develop.
05 - Serve the dressing chilled over a fresh salad of your choice.