Well, I'm back making soup from The Soup Book . Today's recipe was for Moroccan roasted sweet potato soup. The ingredients include sweet potatoes, shallots, garlic, carrot, honey and harissa. Later on I'll be adding yoghurt and lemon juice and serving it with pitta bread. I started it off just after 11 o'clock this morning while my cleaner was here. She hadn't seen sweet potatoes before so I told her what little I thought I knew about them, that they were also called yams and originated in Central America. On checking with Wikipedia just now (yes, I know it's not a totally reliable source) I find I was wrong, that there is a difference between yams (Dioscorea batatas ) and sweet potatoes ( Ipomoea batatas ), the former originating in Africa and Asia, the latter orange-fleshed variety in South America. Apparently they're not even related. Back to the soup. I had to prepare the vegetable, mix the harissa with olive oil, then having coated the vegetables with...