In a large skillet, cook bacon over medium heat until crisp, stirring occasionally. Remove with a slotted spoon; drain on paper towels.
In same skillet, heat drippings over medium-high heat; brown steak in batches. Transfer meat and bacon to a 5- or 6-qt. slow cooker. In a large bowl, combine tomatoes, beef stock, tomato paste, garlic, seasonings and vegetables; pour over meat. Cook, covered, on low 7-9 hours or until meat is tender. Shred beef with two forks; return to slow cooker. Stir in cilantro. Remove with a slotted spoon; serve with rice.
Freeze option: Freeze cooled meat mixture in freezer containers. To use, partially thaw in refrigerator overnight. Microwave, covered, on high in a microwave-safe dish until heated through, gently stirring and adding a little stock or water if necessary.