Peel the garlic clove and place in the jar of the blender.Measure in the white wine vinegar and salt, and cover with the lid.Pulse about 20 times, until the garlic is pulverized, scrapping sides of jar as needed.Add the pepper, yogurt or sour cream, mayonnaise, buttermilk and half of the crumbled feta.Run the blender on medium speed for about 30 seconds to mix the ingredients.Add the oregano, parsley and remaining cheese, and replace the lid.Pulse the blender about 5 or 6 times to combine everything well, but leave some of the cheese in small chunks.Serve over the salad of your choice, or use as a dip for vegetables or chicken wings. Store in the refrigerator.