Cuban Ropa Vieja Recipe by Tasty

Name: Cuban Ropa Vieja Recipe by Tasty
Ingredients: 1 ½ lb flank steak (or skirt steak); kosher salt, to taste; black pepper, to taste; 2 tablespoons olive oil; 1 large white onion, thinly sliced; 1 red bell pepper, thinly sliced; 1 green bell pepper, thinly sliced; 4 garlic cloves, minced; 1 teaspoon ground cumin; 1 teaspoon dried oregano; 2 tablespoons tomato paste; 1 cup tomato sauce (or crushed tomatoes); 1 cup beef broth; ½ cup dry white wine; 2 dried bay leaves; 2 teaspoons white vinegar, or to taste; chopped fresh cilantro, for garnish; For serving: cooked white rice, black beans, and fried plantains (maduros) (optional)