Switch it out this St. Patrick’s Day with this recipe for lamb shepherd’s pie to take the place of corned beef and cabbage at your table. Truth be told, we eat far more corned beef than the Irish do, St. Paddy’s Day or no. Corned beef proliferated on this side of the Atlantic because of the practice of “corning,” or salting beef in large wooden casks or tubs when beef was shipped from Europe to the New World.