Wonderbag Black Bean & Sweet Potato Chilli

Method

1. Set a heavy-based pan over medium heat and fry the onion and garlic in a little oil until soft and golden.
2. Drain the soaked beans and add them to the pan along with the sweet potato and stock. Season with salt.
3. Bring to the boil and cook for 15 minutes.
4. Cover with a tightly fitting lid and transfer the pot to the Wonderbag for a minimum of 4 hours. Place a tea towel or wooden board at the bottom of the Wonderbag to protect the fabric.
5. After 4 hours, check the beans. They should crush easily between your fingers and have no graininess. If not fully cooked, return the pot to the hob, bring it back to the boil for 10 minutes, then return to the Wonderbag for a little longer.
6. Once the beans are tender, stir in the chopped chipotle peppers, adobo sauce, sugar, and tomato paste. Return the pot to the heat and simmer uncovered until any remaining liquid is absorbed. (Note: we add the tomato and adobo at this stage, as their acidity can inhibit the beans from softening if added earlier.)
7. Use a wooden spoon to mash some of the sweet potato into the beans to create a thick, rich sauce.
8. Check the seasoning and serve with rice, avocado, fresh coriander, sour cream or yoghurt, and a wedge of lime.