Authentic Cuban Ropa Vieja with Sweet Plantains (Maduros)

Name: Authentic Cuban Ropa Vieja with Sweet Plantains (Maduros)
Total time: 1 h
Yield: 2 servings
Cuisine: Cuban
Ingredients: 900 g flank steak; 150 g yellow onion; 150 g green bell pepper; 150 g red bell pepper; 10 g garlic; 2 tsp dried oregano; 2 tsp ground cumin; 2 tsp paprika; 2 tsp salt; ½ tsp black pepper; 120 ml dry white wine; 240 ml beef stock; 480 g tomato sauce; 170 g tomato purée; 2 pc bay leaves; 3 pc plantain; avocado oil spray