u/Dismal_Chapter_370

I'm having a costume party where everyone dresses from a different era (80s, caveman, togo, egyptian, the future, viking, etc). I want to have food that is inspired by different eras, but I'm struggling with the older eras. They can be food they actually ate back then, or decorated to look like it, or just inspired. Any ideas? We usually give a trophy to the guest who brings the most unusual food, but I'm not sure if this theme is too hard to do that.