Early in the sixteenth century, chiles were transferred from Portuguese 
Brazil to their colony of Angola. These small, piquin-like chiles (which 
were probably Brazilian malaguetas) were called piri-piri 
(pepper-pepper) and became an integral part of the local cuisine. The 
sauce made from them was transferred back to Portugual, where it is a 
staple on dining tables--served with seafood, soups, and stews. Since 
the piri-piri chiles are not usually available, use chiles de árbol, 
cayenne chiles, chile piquins, or chiltepíns. Note: This recipe requires 
advance preparation.