heat the cooking oil in a large dutch oven over medium high heat
pat the beef dry and brown it in the oil, cooking in two batches if necessary
once the beef is browned, remove it from the pan
reduce the heat to medium and add the onions and peppers
cook until soft, about 5 minutes
add the garlic and cook for another 30 seconds or so
add the tomatoes, Sofrito, water and 1 tsp adobo seasoning(add more as needed)
then return the beef to the pan
bring to a simmer, cover with foil and then the lid
simmer for 3 hours or until the beef is falling apart
you can remove it from the pan and shred it or you can leave it in chunks
either way stir the olives and cilantro into the stew
add salt and pepper to taste
serve over hot rice, with beans or even crusty bread for dipping