How do you say what are we having for lunch in portuguese?

The most common way to say "what are we having for lunch?" in Portuguese is:

O que vamos almoçar?

Here's a breakdown:

* O que - what

* vamos - we are going to (future tense of "ir")

* almoçar - to have lunch

You can also say:

* Qual o almoço de hoje? (What is today's lunch?)

* O que temos para almoçar? (What do we have for lunch?)

The best choice will depend on the context and your desired level of formality.