In medium bowl, add all ingredients and whisk well.
Chill for 2 hours or overnight to let mellow, meld, and the dried onions to soften.
Leave out at room temperature for 30 minutes before using for a more pourable consistency and best flavor. (*This is easiest served, however, ladled from a gravy boat.)
*If too thick for your liking, thin with milk or buttermilk adding SMALL amounts, (1 tsp.), at a time. Don't add too much or you will thin the flavor. It's actually quite delicious when it's thick, and sticks to your salad better and doesn't run all over the plate.