The best steak rub ever. * Chimichurri is a classic Argentine topping used on grilled meats. Known for its fresh herbaceousness, mix this seasoning with olive oil to drizzle over hot steaks or sausages. The brightness of chimichurri also works surprisingly well on fish.. * Pairs deliciously with Grilled Skirt Steak, Burgers, Salads, Tacos, Grilled Swordfish. * Chimichurri also works well as a marinade, salad dressing, or finishing sauce. In Italy, they use a nearly identical sauce blend to drizzle over fresh seafood. * Originating in Argentina and Uruguay, chimichurri is a saucy condiment made up of fresh herbs (and sometimes chili) blended with oil, salt, and vinegar to serve over hot grilled meats.