This delicious hachis parmentier is a French classic. It is a very simple oven bake that consists of 2 layers of cooked beef mince and creamy mashed potatoes.
Finish with the rest of the mashed potatoes. Sprinkle them with the grated cheese. Bake the parmentier in a preheated over at 400°F (200°C) for 20 minutes or until the crust is golden brown. Serve hot.