What foods can't you eat but would like to?

[Teuthida]

Now I don't mean food you can't eat it because it'll make you fat or you're allergic to it. I mean what would you like that's impossible to have. I personally want ice cream made out of unicorn milk. I imagine it would taste magical. But sadly unicorns only lactate rainbows and whoever heard of making ice cream out of rainbows. Unicorn sherbet? No thank you.