Meanwhile, while meat is cooking, chop onion, garlic, pepper, tomato and cilantro.
Add to the meat and continue cooking on a low flame. Add alcaparrado and about 2 tbsp of the brine (the juice from the olives, this adds great flavor) cumin, bay leaf, and more salt if needed. Add tomato sauce and 1/4 cup of water and mix well. Reduce heat and simmer covered about 20 minutes.