So this heathen serves them Japanese trash-tier family restaurant food. And it is far from the first time I've seen that...
And of course they think it so fuckin delicious because if anything is ever meant to NOT be delicious in manga, it has eyeballs, tentacles and a purple miasma... which this doesn't. They could put sparkles on literal dogshit and characters would all comment on how delicious it was.
For that matter, the toilet was probably programmed to announce how delicious everything dumped into it is too. You absolutely fuckin know a talking toilet that praises your waste products would be totally Japanese.