Steak and Guinness pie is a famous English savory pie filled with stewed beef and Guinness, the famous Irish beer. The pie is usually served with mashed potatoes or mashed potatoes and vegetables.To prepare Steak and Guinness pie, you start by sautéing onions, carrots and celery, which are then stewed together with the beef for several hours, gradually adding Guinness liquid to create a thick, flavorful sauce. The meat is then placed inside a shell of puff pastry or brisée dough and covered with another layer of dough, then baked in the oven until the crust turns golden and crispy.Steak and Guinness pie is a popular dish in the United Kingdom and is often served in pubs and restaurants, especially in winter when comfort and hearty food is especially popular. The pie is often associated with English and Irish culinary traditions, and is often accompanied by a pint of dark beer.As for its history, Steak and Guinness pie appears to have been invented in the early 20th century, when Guinness was at the height of its popularity throughout the United Kingdom and Ireland. The dish was probably created as a way to use surplus Guinness beer and to create a hearty and nutritious dish for factory and port workers. Today, Steak and Guinness pie has become a true British culinary institution and is appreciated worldwide for its robust flavor and comfort food texture.