My favourite courgette soup recipe (and the one way I can persuade DH, who thinks courgettes are a waste of space, to eat them) is even simpler.
Grate courgettes and put in pan with butter, pepper, salt and grated nutmeg. Cook gently until courgette is soft. Puree, check seasoning and serve. It tastes as though you've added cream.
The othet tip I've heard, but not tried (and which isn't very selfsufficientish) is to add a cheese triangle (eg laughing cow/Dairylea) to any courgette soup. Supposed to be v nice, but I like the basic version
Hazel