A different sauce for your holiday roast (and almost everything else you eat from now on.) | Chimichurri | Flat iron steak.

If your family’s like mine, there’s probably a holiday roast in your future. Something big and beefy (or porky) and brilliant, and most likely, fat-tastic. Maybe porchetta, or perhaps prime rib. Either way, you probably need a sauce bright and tangy enough to cut through all that deliciousness. Enter that darling of every Argentinian table…