In this recipe from Tunis, artichokes are simmered with baby onions, fennel and harissa and served at room temperature. Harissa is a hot sauce based on dried chillies, garlic and salt that is widely used as a condiment in North Africa. It is readily available at most supermarkets or Middle Eastern stores, but the strength can vary considerably, so you may need to adjust the amount used according to taste. Harissa is also very easy to prepare at home. Always use rubber gloves when handling chillies, and avoid any contact with the eyes.