Place the halved potatoes, onions, and baby carrots in the slow cooker. Add bell pepper and beef.
In a small bowl combine the beef broth, oregano , paprika, parsley, Worcestershire sauce, salt, and pepper. Pour the mixture over meat and vegetables.
Cover and cook the stew on low for 8 to 10 hours.
Turn pot on high. In a small bowl, dissolve the cornstarch in the water. Stir into cooked stew mixture. Cover and continue cooking the stew on high for 15 to 20 minutes or until thickened, stirring occasionally.
