In 1987, Panda Express struck gold when it developed the now-world-famous Original Orange Chicken. The combination of the sticky, sweet-and-sour sauce and crispy chicken was an immediate success and helped put the popular American-Chinese chain on the map. Today, it has more than 2,500 locations worldwide. For a time, Panda Express made a vegan version of its most iconic dish. Yep, back in 2021 the chain trialed Beyond the Original Orange Chicke…