Lasagna on UA. SFO-SYD in C.
I had NO IDEA w.t.f. this stuff was. Luckily I had eaten before the flight, or I would have starved to death. The look on the F/As face who served it to me was priceless.
Oh, you meant "unusual" food? Well, this was plenty unusual. I'd never tasted bloody vomit topped with wax before.