Heat a tablespoon of rapeseed oil in a large, flat pan. Firstly, start by gently browning the potato slices. Do this by frying a few slices for one-two minutes on each side, in batches, until they are all slightly golden. Add a little more oil to the pan as necessary. Keep all the potatoes to one side, on some kitchen paper, until later. You can skip the potato-browning stage if you want a quicker version.

Once that's done, in the same pan, add a further tablespoon of oil and cook the onions and garlic until soft and golden. Add the minced/ground lamb, turning up the heat a little to brown the meat all over. Sprinkle over the cinnamon and dried oregano and stir. Add in the tomato paste, canned tomatoes and season with salt and pepper. Turn down the heat and allow the sauce to simmer for 30 minutes.

In the meantime, make the quick cheese sauce by gently heating the creme fraiche and stirring through all the cheese until melted. Add a splash of milk to loosen the sauce, take it off the heat, allow to cool a little then whisk in the beaten egg.

When you are ready to eat, preheat the oven to 180C/350F/Gas 4.

Lightly grease three small dishes or one large baking dish with a little butter. Spoon in some of the lamb sauce, then a layer of potato, then a further layer of lamb sauce followed again by potato. Pour the cheese sauce over the top.

Bake in the pre-heated oven for 35-40 minutes, until the potatoes are soft and the top is golden.