Ropa Vieja

1 lb. flank steak
Kosher salt and black pepper, to taste
1 medium yellow onion, thinly sliced
1 Cubanelle or green pepper, thinly sliced
6 oz. tomato paste
1 tbsp. cumin
1 tbsp. dried thyme
1 tbsp. dried oregano
5 cloves garlic, finely chopped
1 bay leaf
½ cup dry white wine
2 cups beef stock
1 (16-oz.) can whole peeled tomatoes, crushed
½ cup halved, pitted green olives
⅓ cup sliced jarred pimiento peppers
3 tbsp. capers, rinsed and drained
1 tbsp. white wine vinegar
¼ cup roughly chopped cilantro

Season steak with salt and pepper. Sear until browned on both sides; transfer to plate.
Add onion and peppers; cook until soft, about 4 minutes.
Add tomato paste, cumin, thyme, oregano, garlic, and bay leaf; cook until lightly caramelized, about 3 minutes.
Add wine; cook, scraping bottom of pot, for 1 minute.
Return steak to pot with stock and tomatoes; boil. Reduce heat to medium-low; cook, covered, until steak is very tender, 2–3 hours.
Remove steak, and shred; return meat to pot with olives, pimientos, capers, and vinegar. Cook until sauce is slightly thickened, about 30 minutes.


Source: http://www.saveur.com/article/Recipes/Cuban-Style-Ropa-Vieja