Which of the following ingredients is NOT part of the homestyle potato salad?

The ingredient that is not part of homestyle potato salad is bacon. Traditional homestyle potato salad typically includes ingredients like potatoes, celery, mustard, and hard-cooked eggs, which contribute to its creamy texture and classic flavor profile.

Bacon, while a popular ingredient in many salads and dishes for added flavor and crunch, is not a standard component of homestyle potato salad. This type of salad focuses on more traditional elements that enhance the creamy, tangy taste without additional smoky flavors that bacon would introduce. Therefore, bacon is the ingredient that stands out as not belonging to the traditional recipe.