Sauté the onion with the olive oil in a marge skillet over medium heat until opaque. Add the chorizo, breaking it up with a wooden spoon as it cooks for 5 minutes. Add the beans and cook for a further 2 minutes. Stir through the tomato paste and turn off the heat. Set aside to cool, then stir through the 60 g mozzarella and ¼ cup coriander.