Slow-cooked chipotle chicken

Method

1. Heat the oven to 170°C/150°C fan/gas 3½. Heat 2 tbsp of the oil in a hob safe casserole or large ovenproof sauté pan (you’ll need a lid) over a high heat, then fry the chicken in batches, turning often, for 3-4 minutes until browned all over. Remove and set aside.
2. Heat the remaining oil in the casserole/pan, then fry the onions and peppers for 2-3 minutes. Add the garlic, cumin, paprika, chipotle paste and cocoa, stirring to combine.
3. Return the chicken and any juices to the casserole, stir to coat, then add the chopped tomatoes and stock. Bring to a simmer, season with salt and pepper, then cover and cook in the oven for 1½ hours.
4. Add the beans to the stew and cook, uncovered, for 30 minutes more until the sauce has reduced and thickened.
5. Meanwhile, put all the guacamole ingredients in a food processor. Season with salt and pepper, add a little more lime juice to taste, then pulse until roughly chopped and combined but still with some texture. (Or mash everything together in a mixing bowl with a fork until as smooth as possible.)
6. Serve the chicken on warm tortillas topped with guacamole, soured cream, coriander and a squeeze of lime.