www.mumsnet.com/Recipes?call=RecipePage&pid=2558
I want to cook this tomorrow and leave it overnight for the taste to develop and serve on Saturday. However, I cannot find any sweet potato (I live in Italy). Is butternut squash a good substitute? Or, any suggestions as to what I can use. I have been able to get all the ingredients (harissa paste was a surprise) but am having to use coriander seeds instead of the fresh stuff. tia