Next, make the beans. Heating the olive oil in a frying pan and when warm, add the garlic and chilli, plus a pinch of salt, stirring for about 3 mins. Add the cumin, let it sizzle for about 1 min – making sure it doesn’t burn, then add the black beans, crushing some of the beans with the back of a wooden spoon. Season with freshly ground black pepper and a little more salt, if needed. Continue to heat gently while you make the guacamole.