In The Fifth Element, instant roast chicken was made by putting a dish in a microwave-like apparatus with some sort of seasoning. Leeloo is so hungry that she eats one and immediately returns to make more. Watch the scene here.

In recreating this dish, one could purchase microwaveable chicken; or simply a rotisserie chicken.

In some sense, the recreation of fictional dishes is an opportunity for creative expression. Until the actual technology from the film is available, these make do in a pinch.