Fresh and dried chile peppers provide heat in Thai food. Fresh cayenne chiles are used in curries. Fiery hot Thai “bird” chiles are used in sauces and stir-fries. Refrigerate fresh chiles up to a week or store in the freezer. Use serrano or jalapeño chiles if you can’t find bird or cayenne. Dried red chiles are commonly used to make curry paste and add heat to soups and stir-fries.