I found this recipe in Guy FIeri's Diners, Drive-ins, and Dives from Bob Mueller of Louie Mueller Barbecue in Taylor, Texas. I must admit I thought the ingredients sounded too simple to be so delicious. This is a potato salad you can't stop eating. I really liked the idea of mashing the potatoes because I've been told the secret to a great potato salad is small and uniform potatoes. I'm way too impatient to dice perfect potatoes, but I did partly mash them and loved the creamy texture (next time I'll mash more thoroughly). Mashing potatoes makes them taste better for some reason, kind of like what happens when shredding cheese (it's just tastier)! I'll make this one again because it's that good. I may have found the potato salad motherload. Serving size is estimated because it wasn't listed.