Black-bean Soup with Tomato and Avocado Relish

Black beans, not to be confused with black-eyed beans, are small, shiny and kidney-shaped. Their slightly sweet flavour is complemented by onions and garlic, goes well with coriander, cumin and tomatoes, and needs to be pepped up with chilli. This soup combines all those flavours and the result is an intriguingly aromatic, thick and chunky soup, freshened up with a ‘salad’ of raw tomato and avocado seasoned with lemon juice.

Serve it with coriander gar