Preheat oven to 130°C (fan-forced).
Mix the cumin, paprika, oregano, coriander, and salt. Score the fat side of the brisket and rub the spice mix all over.
Heat olive oil in a large oven-safe pot. Brown the brisket on both sides, then transfer to a plate to rest.
In the same pot, add capsicum, red onion, and garlic. Sauté until softened and slightly caramelised.
Stir in tomato paste and cook for 30 seconds.
Add diced tomatoes, bone broth, lemon rind, bay leaves, cinnamon stick, and coriander stems, and bean/organ powder if using. Stir to combine.
Nestle the brisket (and its juices) back into the pot. Cover and cook in the oven for 6 hours, or until fall-apart tender.
Shred the brisket into the sauce and stir through.