The primary ingredient in a traditional shepherd's pie is ground lamb, although some recipes may use ground beef. The dish, originating from the United Kingdom, traditionally consists of a layer of cooked minced lamb, seasoned with vegetables like peas and carrots, and topped with a layer of creamy mashed potatoes. The potatoes are often browned in the oven, creating a crispy top layer. Shepherd's pie is celebrated for its comforting flavors and is often served as a hearty meal. It reflects the use of simple, local ingredients to create satisfying dishes.