Grilled Hanger Steak with Chimichurri Sauce

Name: Grilled Hanger Steak with Chimichurri Sauce
Ingredients: 3 cups flat-leaf parsley leaves (from about 3 bunches), very finely chopped; 6 garlic cloves, very finely chopped; 1½ teaspoons finely chopped fresh oregano leaves; ¼ cup distilled white vinegar; 1 tablespoon plus 1 teaspoon kosher salt, divided; 1 teaspoon freshly ground black pepper; ¾ teaspoon dried red pepper flakes; 1 small dried bay leaf; ¾ cup extra-virgin olive oil; One 1½-pound hanger steak; 2 teaspoons grapeseed or canola oil