Ingredients
1 28-oz can diced tomatoes, drained
2 red bell peppers, sliced 1/2 inch thick
1 onion, cut into 8 wedges
2 t dried oregano
1 t ground cumin
kosher salt and black pepper
1 & 1/2 pounds flank steak, cut crosswise into thirds
Optional: sliced avocado, chopped cilantro
Preparation
In a 5 to 6-quart slow cooker, combine the tomatoes, bell peppers, onion, oregano, cumin, 1 & 1/2 t salt, and 1/4 t pepper. Nestle the steak among the vegetables. Cook, covered, until the meat is tender and pulls apart easily, on high for 4-5 hours or on low for 7-8 hours.
Using 2 forks, shred the beef and mix it into the cooking liquid. Serve over rice topped with avocado and cilantro, if desired.