Is it correct to say is impossible cook this food?

No, that sentence is grammatically incorrect. Here's why:

* "Is" should be "It": The sentence should start with "It" as the subject, referring to the act of cooking the food.

* "Impossible" needs an infinitive: You need to use the infinitive form of the verb ("to cook") after "impossible".

Here are some correct ways to phrase the sentence:

* It is impossible to cook this food.

* It's impossible to cook this food.

* This food is impossible to cook.