Bonjour Liyunzi,

That's a very interesting question! In this specific case, Le Passé Composé is the correct tense. The narrator is making an announcement having previously "mentioned" the dish (not with the exact same expression though: "la star des plats"). This is often used by TV / radio hosts. It has a "idiomatic" dimension to it too.

I hope this is helpful.

Bonne journée !