Heat oil in a large pan. Brown beef in batches, breaking up with a spoon. Tip into slow cooker.
Same pan, cook onions and capsicum 8 min. Add garlic and all spices, stir 60 sec. Tip into cooker.
Add tomatoes, beans, stock, tomato paste to cooker. Stir well.
Cover. Cook low 8 hours (or high 4 hours).
Taste. Adjust salt and chili powder. Serve with grated cheese, sour cream, sliced jalapeno, coriander, lime.