[Is... her palate solely wired to desserts?]

Those would certainly be quite complimentary together.

[Yuki samples a bit of cheese curiously, the possibilities of what it could taste like are theoretically limitless -- at least until he bites down.

Is it even a reasonable thing to be disappointed when it also tastes like lemon tart?]

Although perhaps in an endeavor as fantastical as this variety may be asking too much.