Papa John’s will open 320 new restaurants this fiscal year as part of a plan to grow by at least 1,400 and as many as 1,800 over the next three years, the company said. The chain reported a 1.9% increase in first-quarter same-store sales in North America, fueled by the popularity of premium-priced items like its NY-Style Pizza and the Epic Pepperoni Stuffed Crust Pizza. Nation’s Restaurant News