Beef

Preheat the oven to 250°F.
Take beef out of the fridge to come to room temperature
Pulse onions and garlic in a food processor until finely chopped
Heat olive oil in a large casserole and sear beef on all sides until golden
Remove beef to a plate, add more olive oil and brown the chorizo
Add onions, garlic, cumin, allspice, cloves, cinnamon stick, bay leaves, oregano and ancho chillies and cook until soft in the chorizo oil
Season with salt and pepper and add balsamic vinegar, plum tomatoes, tomato ketchup and dark brown sugar
Return all meat to the pot, add 400ml water (or red wine), bring to a simmer, cover and transfer to the oven
After 2 hours check the meat and add borlotti beans
Cook for a further hour then pull the meat apart with forks before serving