A traditional layered dish of equal parts seasoned lamb or mutton chops, potatoes and onions. Water or stock is poured over all, the pot is covered tightly and the stew is cooked slowly for 2 to 3 hours. It`s best made the day before to allow the flavors to blend.
this soup glossary says it's a stew made of seasoned lamb or mutton chops, potatoes and onions, covered with water or broth and stewed for several hours.
Irish stew is a traditional Irish dish made from lamb or mutton as well as potatoes, onions, and parsley1. It originated in Ireland but appears in cookbooks all over Europe, including in Escoffier's Guide Culinaire.