1. Mince the garlic cloves and chop the chilli peppers. Place together in a bowl, mix together, and set aside.
2. Break the dark chocolate into small pieces and set aside.
3. Open cans of beans, tomatoes, and tomato purée. Tip beans into a strainer, rinse thoroughly, and set aside.
4. Mix one teaspoon of cumin, two teaspoons of paprika, and two teaspoons of chilli powder in a small bowl and set aside.
5. Finely chop the onion, and place in a large pot with one tablespoon of olive oil. Sauté until golden brown.
6. Add the ground beef and a second tablespoon of olive oil. Carry on sautéing at same heat until beef is entirely browned.
7. Add 350ml of water, garlic and chilli mix, spice mix, tomatoes, tomato purée, and beans. Mix well, bring to boil, then reduce heat to very low.
8. Add a little salt. Grind black pepper generously.
9. Add dark chocolate. Place lid on top of pot at an angle, ensuring it is still open to the air. Set a repeating timer for 7 minutes and stir every time it finishes, ensuring nothing is stuck to the bottom of the pot. Taste intermittently and add additional chilli powder/paprika as desired.
10. Continue until mixture is thick enough that the bottom of the pot becomes visible for a second while stirring.
11. Turn off heat, place lid fully on pot, and let sit for 10 minutes before serving.
12. Serve in a bowl atop rice. Add garnish/toppings/etc. Suggestions: grated cheese, sour cream, chopped spring onions, chives, fresh coriander.