Hachis Parmentier is a classic French dish that is similar to shepherd's pie. This hearty dish consists of two layers: a bottom layer of seasoned ground beef cooked with beef gravy, carrots, celery, onions and a top layer of mashed potatoes. The beef mixture is simmered in red wine and beef gravy, which gives it a rich and savoury flavor. The mashed potatoes are mixed with butter and milk, which adds a creamy texture to the dish.