The main ingredient in a traditional Irish stew is lamb or mutton. This hearty dish typically includes chunks of meat, potatoes, carrots, onions, and sometimes parsley. The ingredients are slowly cooked, allowing the flavors to meld and create a comforting and savory meal. Irish stew has its roots in the rural traditions of Ireland, where farming communities would use readily available ingredients to prepare nourishing food, particularly during harsh winters. The recipe can vary by region and personal preference, which adds to its charm as a beloved staple in Irish cuisine.