Chillies are the pods of an annual plant of the capsicum family. There are hundreds of varieties but they all have fire power. Fresh unripe chillies come in various shades of green and in all shapes and sizes. The ripe ones are red and vary according to type in taste and heat. Chillies are always most pungent when raw, and mellow when cooked. When chopping chillies, make sure you don't rub your eyes as they will smart.