Well this was much more of a stew than a soup! It wasa thick and warming and a strange combination of summer-y flavours and winter-y textures. A good soup, then, for spring or autumn! It was tasty although the curry and tomato overpower the rest (I did not use harissa, as I don't like hot food). The bread wasn't really necessary to mop anything up; I would use more stock if you want to make it into a proper soup.
Here is the recipe:
http://www.bbcgoodfood.com/recipes/527628/spiced-tomato-and-couscous-soup-
There's lots of room for variation; a couple of comments suggested leeks instead of celery, you could use different spices instead of harissa (I used a Moroccan spice rub by Schwartz), you can add a dollop of yoghurt or creme fraiche... experiment!
Oh, and if you leave it overnight it will suck up all the moisture. This actually makes it quite a good thing to take to work for lunch.
