1. Trim fat from meat. Cut steak into serving-size pieces. In a 12-inch skillet brown meat on all sides in hot oil (add more oil, if necessary). Drain off fat.
2. Place onion in a 3-1/2- or 4-quart slow cooker. Add meat. Sprinkle meat with tapioca. Add soy sauce, garlic, bay leaves, and oregano. Pour coffee over all.
3. Cover and cook on low-heat setting for 8 to 10 hours or on high-heat setting for 4 to 5 hours.
4. Remove meat and onions to serving platter. Discard bay leaves. Spoon some of the cooking juices over meat and onions. Makes 6 servings.