Add Yahoo as a preferred source to see more of our stories on Google. The good news: The price of potatoes has dropped 4.4% in the last year. The bad news: Grocery-store potato salad is still awful.

A new Reser’s Fine Foods plant in Pasco is a testament to how the company, which started in a farmhouse kitchen, became one of the most successful private businesses in the country. Oregon-based Reser ...