Questions & Answers about ظاهر غذا عالی که هست، اما گوشت آن خام است.
How does the عالی که هست structure work here compared to just saying عالی است؟
This is the core concession structure of this lesson! By placing که directly after the adjective (عالی) and using the emphatic verb هست, the speaker is strongly conceding a point: "The food's appearance is excellent (I admit), but...". It perfectly sets up the contrast introduced by اما (but).
Why does the first half use هست while the second half uses است؟
In the first half, هست is used for emphasis. The structure [Adjective] + که + هست emphasizes the reality of the trait to make the concession stronger ("it is indeed excellent"). The second half simply states a plain fact ("it is raw"), so the standard copula است is used.
Could we move که to right after غذا instead? (ظاهر غذا که عالی هست)
Yes, but it subtly shifts the focus. If you say ظاهر غذا که عالی هست, you are topicalizing the subject rather than the adjective. It means "As for the food's appearance, it's excellent, but...". Keeping که after عالی puts the emphasis squarely on the excellence itself.
Could we use a possessive suffix instead of آن in گوشت آن (its meat)?
Absolutely. You could say گوشتش (its meat), which is very common, especially in everyday speech. Using the independent pronoun آن (گوشت آن) is slightly more formal or literary, which matches the overall polite and written-style tone of this sentence.