I hope I’m not imagining it, but I can’t find any trace of it through advanced search!
OP was a gay man whose boyfriend’s brother and SIL had invited them over for “Christmas food” a few days before Christmas itself. He went expecting an actual Christmas dinner (turkey and so on) but they were actually serving party nibbles (so Christmas party food rather than the strict definition of Christmas food, if there is one).
He actually confronted them and got into an argument about it - I think there might have even been tears! - and declared that they’d basically conned him by saying they would be serving Christmas food. It ended up with the brother not speaking to the boyfriend, OP and boyfriend falling out…
Tell me I didn’t dream it!!