To make the dip, whisk the buttermilk, mayonnaise, Worcestershire sauce, onion powder, onion flakes, garlic powder, chives, dill and parsley in a bowl; add salt and pepper to taste.
Place dip in a small bowl.
Vegetable Tray
Place bowl at the bottom of a large serving platter, as this will be the body of the turkey, take one of the bell peppers (any color you want) and slice off the bottom - this will be the turkey's face. Place it near the top of the bowl. You can also make a beak out a piece of the orange bell pepper if desired and place eyes on the turkey face as well!
Wash, cut, and prep all the vegetables, then start assembling them by arranging the first layer of "turkey feathers" along the outer edge of the platter (I recommend using a large circle plate or platter).
Continue layering the rest of your vegetables in a "rainbow formation" (or half circles) on your platter, surrounding the "turkey body" (aka your vegetable dip). Add in olives in any half circle on your turkey or as a filler. Be sure to slightly overlap each layer of vegetables so that it looks like turkey feathers.
Continue until you have used up all your vegetables and serve!
Notes
You can also use a store-bought veggie dip if you don't want to make your own!