Stir the toasted spices, paprika and black pepper into the tomato mixture. Cook for 5 minutes. Add the sugar, stirring until dissolved. Continue cooking over a gentle bubbling simmer or 30 minutes ...
Add the cumin and 1 teaspoon of the paprika and cook for a few seconds, stirring. Add the tomatoes, black beans, sweet potato, sweetcorn and 400ml /14fl oz cold water. Bring to a gentle simmer ...