Harissa and confit garlic roast potatoes

Anything with the word ‘confit’ in it is enough to put some people off but don’t be intimidated! All that it entails, in this context, is slow-cooking the garlic for so long that the oil becomes wonderfully infused and the cloves themselves become super soft. The confit garlic can be made up to 2 days in advance and the potatoes can be prepared up to the point of them going in the oven, about 6 hours in advance.