Steps
- Preheat the oven to 350°F / 180°C. Line the base of an 11in / 28cm springform pan with parchment. Line the base and sides with half of 540g of puff pastry; chill.
- Melt 1 tablespoon of butter in a skillet over medium heat. Soften 300g of chopped onions and 300g of sliced leeks for 7 minutes. Season with salt, pepper, and nutmeg; cool.
- Fry 300g of sliced bacon in the same pan until lightly crisp, then cool.
- Prepare 250g of cored thinly sliced apples, 250g of cored thinly sliced pears, 700g of grated raclette cheese, and 800g of thinly sliced boiled potatoes.
- Layer apples, cheese, potatoes, onions and leeks, bacon, then pears in the pastry. Repeat until the filling is used, seasoning lightly between layers.
- Roll the remaining pastry over the filling and seal the edges. Beat 1 egg with 1 pinch of salt and brush over the lid.
- Bake for 30-40 minutes, until the pastry is golden and the filling is hot.