Child "hates" food they liked before

[MuffinFace]

My child is 7 years old. He has food likes and dislikes, like most children, and I do my best to accommodate these when meal planning. His tastes have changed over time, of course, and I fully accept this.
Occasionally, like a few times a year, I will serve something for dinner and he will immediately claim he hates it, has never liked it, etc. It is usually with foods we haven't had in a while, though not always. It has even happened when we've tried out a new recipe, he's proclaimed it to be "the best thing ever" and then a couple of weeks later when we next eat it he claims he hates it. He doesn't try it first or anything, just sees it and immediately moans about not liking it.
I've tried a bunch of things to get him past it but basically once his mind is made up that he "hates it", it sticks and he doesn't want to eat it any more. It's driving me slightly nuts!
Can anyone explain to me what's likely going on here or give any suggestions for how to help him not do it/change his mind back?

I think you have a normal child. I can’t explain it but it’s a thing. Sorry!

My DH does this! Dishes I've served from time to time for years he declares he never liked. Drives me mad.

I think this is normal. I’ve always seen it as a young child’s natural tendency to over-dramatize a feeling like “I don’t particularly fancy this tonight”. Just like sometimes I don’t fancy whatever leftovers I have in the fridge, so I inwardly grown and put off lunch until I’m starving and have no choice.

My solution is to deal with it undramatically. I don’t try to reason with them. I just say “this is what we have for dinner tonight. If you really can’t bring yourself to eat it, you can get an apple from the fridge instead.”

Maybe 40% of the time, once everyone starts eating, whichever kid didn’t want what I’d made will serve themselves some after all and will eat very well. The rest of the time, they’ll have an Apple at the table and maybe a slice of toast before bed.

I think it's normal. I'm the same. Last night I didn't want the planned chicken fajitas so I had a micro mac and cheese. I can't eat what I don't want.

Well reassuring to hear it's maybe normal! Perhaps I wasn't quite clear though (or perhaps I was and your answers stand anyway) - when I say he doesn't want it any more, I mean ever, not just that night. So I totally get not fancying something and exaggerating it to be "I've always hated it", but he really does seem never to like whatever food again - if he declares one night he hates pasta bolognaise and never liked it, he'll say the same at every occasion from then on if I serve it up again. That's what I'm really struggling with - it fully removes meals he used to like from our dinner options!