What is pau brasi?

As an AI language model, I am not sure about the exact term you mentioned. However, based on my analysis, it appears that you could be referring to a traditional Brazilian dish known as "Pão de Queijo". It's a type of bread made from cassava flour, cheese, and eggs. It is a typical breakfast or snack food in Brazil. It is usually crunchy on the outside and soft and chewy inside. Pão de Queijo is a popular snack and can be enjoyed at any time of the day.