Instead of traditional corned beef and cabbage opt for steak and Guinness pie for St. Patrick's Day. A richly flavored beef stew is hidden under a layer of buttery puff pastry. The dark Guinness beer lends a toasted underlying flavor to this stew that is necessary to make this recipe authentic. On the side, serve buttered sweet peas and carrots with roasted potatoes. Steak and Guinness pie is a must-have to celebrate this Irish holiday.