Brazilian Flank Steak with Fresh Chimichurri and Fried Yucca

Name: Brazilian Flank Steak with Fresh Chimichurri and Fried Yucca
Ingredients: One 1 1/2-pound flank steak; 3 tablespoons Worcestershire sauce; Freshly ground black pepper; Coarse salt; 2 cups chopped fresh cilantro; 1 cup chopped fresh parsley; 2 tablespoons olive oil; 1/2 teaspoon ground cumin; Juice of 1/2 lemon; Rice vinegar; Kosher salt; Vegetable oil, for frying; 2 yucca roots, peeled, cut into 2-inch pieces and parboiled; 1 tablespoon fine salt; 1/2 tablespoon sugar; 1 teaspoon chili powder