"Here such a tasty food" isn't English at all. Or at best, it's 'pidgin English' : English words thrown together without any regard for grammar, or English words used with the syntax of another language (such as Chinese). People would understand what you meant if you said it, but it's nonsense in grammatical terms: there isn't even a verb in the sentence. And remember that 'food' in this sense is uncountable, so the 'a' shouldn't be there.

You may have misheard part of the sentence or the speaker was copying internet style advertising or comments on comparison sites. Where "so cool here and such tasty food" type sentences abound and you see them thousands of times on such forums, where people have to use a new style of social media/comparison site English. That is pidgin like.

Thank you Gray

Su.Ki is right. "Here such tasty food" sounds extremely non-native. It sounds like a word-by-word translation from another language. (Chinese, for instance, uses word order very much like this).

The first sentence would be more correct as, "This place offers such tasty food!" Yes, it means basically the same as "The food is tasty here!" You're on the right track!