The Mid-Autumn Festival is a traditional Chinese festival, which is deeply ingrained in people's hearts. If you use foreign food instead of moon cakes (maybe you don't mean this), it seems not easy to be accepted.
Try to think about it, for example, instead of each person eating a piece of moon cake, it is better to eat one piece together as a family. Pizza is round and everyone can eat a piece together. How about relying on this aspect?