1 Cook the potatoes in salted water for 30 minutes, then drain and peel them.
2 Peel the onion and chop it finely. Pan-fry it in the oil with a knob of butter for 2 minutes. When the onion starts to brown, add the ground beef and currants, season with salt and pepper. Stop cooking once the meat is done.
3 Cut the eggplants into slices, then pan-fry them on each side in a separate pan.
4 Mash the potatoes with a fork, then add the grated Emmental so it binds with the purée.
5 Preheat the oven for 10 minutes at 410°F (210°C) (gas mark 7).
6 In a gratin dish, spread half of the potato and Emmental purée on the bottom, then add the ground beef and currant mixture, the pan-fried eggplant slices, and finally the rest of the potato purée.
7 Bake the dish for 20 to 25 minutes.
8 Serve with a salad on the side.
9 My personal touch: while the parmentier cooks, spread a handful of grated Emmental on parchment paper, place it on a rack in the upper part of the oven, and let it brown for 8 to 10 minutes. Let it cool and peel off the Emmental crisps, shaping them as you like. Present them as a refined garnish on top of each serving. Enjoy!
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