Turn on the Sauté function at 320°F for 30 Minutes and add the olive oil. Cut the flank steak into large slabs that fit within the inner pot. Season liberally with salt on all sides.
Sear each flank steak for about 5 Minutes on each side, or until golden brown. Set aside when done and repeat until all steaks are complete.
Return the meat to the pot. Add the onion, garlic, cumin seeds, peppers, whole peeled tomatoes, and beef broth. Stir to ensure everything is evenly coated.
Place the lid on top and Slow Cook on High for 4 Hours 30 Minutes, or on Low for 9 Hours.
After the time is done, shred the meat with a fork. Add in the halved green olives, and season to taste. Serve with white rice, grilled plantains, and black beans.