Pour the salt over the chopped garlic, using a knife or fork or any flat edge, smush the garlic and salt together until it makes a nice paste. In a medium bowl, using a whisk, mix all the remaining ingredients except the buttermilk. Once blended slowly add the buttermilk until you get your desired consitentency. Refrigerate for at least 2 hours and if you can wait, refrigerate for 24 hours for optimal flavor. This makes about 2 cups of the best Ranch dressing I've ever had!