Step 1

Set the slow cooker to low. Heat 1½ tbsp oil in a large, non-stick pan over a high heat and fry the mince for 10-12 mins or until evenly browned. Tip into the slow cooker.

Step 2

Heat the remaining oil in the pan. Fry the onion, celery and pepper for 10 mins or until softened. Add the garlic, cumin and paprika and fry for 1 min. Tip into the slow cooker.

Step 3

Stir in the oregano, chipotle paste, tomato purée, tomatoes and stock. Season. Cover and cook for 6-8 hrs.

Step 4

Stir in the beans and chocolate during the final 30 mins of cooking. Serve with a bowl of rice or tortilla chips and a dollop of soured cream.