Chickpea, Cavolo Nero and Harissa Stew

Tinned tomatoes are great for making a rich sauce, whether as the main attraction or a support act for other headline ingredients; here they’re the perfect base for loading with veg and spicing up with harissa. I often make a spin on this dish, including whatever veg I’ve got lying around and swapping new potatoes for sweet potatoes, cavolo nero for spinach or cabbage and courgette (zucchini) for a red (bell) pepper.