the correct position of the verb in a specific indirect question

06:40 May 10, 2023 

Thanks again.

21:27 May 9, 2023 

I would tend to avoid 'what the best food is', as that would lean towards meaning "which is the best type of food to eat in any given place?" I think what you really mean here is more along the lines of "where to find the best food...?"
There is no grammar rule that says the verb should be at the end because it is an 'indirect question': "What was he doing?" >> Fred asked him what he was doing? The 'grammar rule' here would be inversion of the subject/verb word order. Note one might equally well write "Fred asked him what was he doing?", which places the emphasis more on the way Fred asked him. This is like Yvonne's 2 alternative proposals.

12:41 May 5, 2023 

Thanks a lot.

09:09 May 5, 2023 

what's

08:59 May 5, 2023 

Best omit 'is' altogether; just ' to discover the best food in the place you're visiting/ going to visit'; also, leave out the interrogative aspect.

08:33 May 5, 2023 

But it's an indirect question, isn't it?

08:25 May 5, 2023 

It's understandable but not the best. Better to say "....to find out what is the best food in the place you're going to visit."