Not as fiddly as the truly authentic version but pretty good.
You need:

  • 250gms dried black beans
  • 1 onion chopped roughly
  • 1 green pepper seeded and chopped roughly
  • 2 cloves garlic
  • 1 tsp dried cumin
  • Olive oil

Sweat the onion, pepper and garlic in the oil for five minutes
Add the cumin and dried beans
Cover with water with 2cm to spare
Boil like crazy for 10 minutes
Simmer for 1.5 hours, keeping an eye on the water level. Stir occasionally to prevent sticking.
Remove the vegetables and a few beans, and whiz to a gloop (or corner the veg and use a stick).
Stir it back in so you have a nice thick sauce and very soft beans.
Adjust the seasoning.
Serve with rice and grilled pork or chicken.