Shepherd's pie is a hearty British dish that can be prepared with the help of a food processor. Use the food processor to chop onions, carrots, and garlic for the filling. Brown ground lamb or beef in a pan, then add the chopped vegetables, tomato paste, and seasonings. Transfer the mixture to a baking dish and top it with mashed potatoes, which can be easily made using the food processor. Bake until the top is golden and enjoy this comforting meal!