Craving the bold flavors she tasted in Argentina, Joanne shows her student Leigh how to give grilled skirt steak a boost with a fresh and zesty chimichurri sauce. And potatoes get the double treatment of roasting and grilling becoming twice as flavorful. Recipes: Gazpacho Salad, Grilled Skirt Steak with Chimichurri, Roasted and Grilled Potatoes. Student: Leigh Balkon.