Blackened Hanger Steak with Plantains and Chimichurri

Name: Blackened Hanger Steak with Plantains and Chimichurri
Ingredients: 2 tablespoons paprika; 2 teaspoons onion powder; 2 teaspoons garlic powder; 1 teaspoon kosher salt; 1/4 teaspoon cayenne; 1/4 teaspoon chili powder; 1/4 teaspoon freshly ground black pepper; Two 8-ounce hanger steaks; 2 tablespoons vegetable oil; 1 cup fresh flat-leaf parsley; 1/4 cup fresh cilantro; 1/4 cup red wine vinegar; 2 cloves garlic, minced; 1/2 teaspoon crushed red pepper; 1/2 cup extra-virgin olive oil; Kosher salt and freshly ground black pepper; 1 cup vegetable oil; 4 very ripe, black plantains, peeled and cut on the bias into 1/2-inch pieces; Garlic salt, for seasoning