Place a layer of mashed potatoes in a terracotta or porcelain dish, alternate with layers of
meat until you finish with a layer of mashed potatoes. Use a spatula to draw waves on the puree as a decoration, cover with breadcrumbs and sprinkle with several bits of
butter.
Cook in a hot oven at a temperature of 220°C or th8 until the top of the Hachis Parmentier becomes a golden
brown.