Chimichurri, or argentinian pesto, is full of the herbal scents of cilantro and parsley, spiced with chiles and smoothed with olive oil. It was first created to preserve the flavor of argentinian beef, some of the best in the world. For this recipe, quickly sear and thinly slice tri-tip steaks. Serve in the simple argentinian way with chimichurri, roasted sweet potatoes and a clean, fresh salad of tomatoes and shaved red onion.