Punch Romaine, a rum-spiked shaved-ice palate cleanser served to first-class passengers during the fateful last dinner aboard the Titanic on April 14, 1912, was based on a recipe from famed French chef Georges Auguste Escoffier, who championed alcoholic shaved ices during the early 20th century. The original recipe, essentially a granita, is updated here as a drinkable, citrusy cocktail poured over an iceberg of crushed ice.