Although chillies, these 7cm-long peppers are sweet rather than hot. They are roasted over embers, peeled and de-seeded then sold in jars or tins. Available from supermarkets or specialty food stores. Whole ones are often stuffed with meat, such as crumbled chorizo, or with seafood or cheese, and are served as tapas. Sliced piquillo peppers are good blended into sauces.