Bacon-Horseradish Potato Salad

Southerners have no monopoly on classic American potato salad enhanced with all sorts of other ingredients and dressed primarily with mayonnaise, but they do draw a strict line when it comes to the variety of potato. Round, red boiling potatoes are the cardinal rule in the South (russets and other baking potatoes are considered too mealy and starchy for potato salad), with the only other acceptable type being yellow-fleshed Yukon Golds. “Tater” salad is almost as popular as coleslaw with po