Ingredients: Flank steak, === MARINADE ===, Red wine vinegar, Olive oil, Coarse salt, Freshly-ground black pepper, Crushed oregano, Cumin seeds toasted and, Garlic cloves minced, === FILLING ===, Bunch Spinach cleaned,, Peeled carrots halved, and parboiled, Coarse salt, Freshly-ground black pepper, Vegetable oil, Beef stock (to cover meat), To 2), Recipe Salsa Criolla see *, ...