Leftover lamb shepherd's pie is a delicious and comforting dish that transforms leftover lamb into a new and flavorful meal. The pie features a layer of tender leftover lamb, mixed with vegetables and gravy, topped with creamy mashed potatoes, and baked until golden and bubbling. It is a great way to use up any leftover lamb and create a satisfying and hearty dinner. Serve the shepherd's pie with a side of green vegetables for a complete meal.