A fantastic spicy recipe and a real family favourite.
Add the tomato puree, chopped tomatoes, beef stock and a teaspoon of sugar at this stage and stir. Put the lid on, bring to the boil and simmer for 20 minutes, stirring occasionally.
Drain and rinse the kidney beans, add them to the pot (and Worcestershire sauce if using), then bring to the boil and simmer with the lid off for a further ten minutes.