4 tablespoons of butter
2 tablespoons of puff pastry flour
800g of sweet potato, peeled and cut into thin slices
500g of zucchini, with skin, cut into thin slices
1/2 cup of grated Parmesan cheese
1/2 cup of grated Emmental cheese
For the bechamel sauce
50g of butter
1/3 cup of all-purpose flour
1 liter of milk
Salt, nutmeg, and black pepper to taste
4 tablespoons of butter
2 tablespoons of puff pastry flour
800g of sweet potato, peeled and cut into thin slices
500g of zucchini, with skin, cut into thin slices
1/2 cup of grated Parmesan cheese
1/2 cup of grated Emmental cheese
For the bechamel sauce
50g of butter
1/3 cup of all-purpose flour
1 liter of milk
Salt, nutmeg, and black pepper to taste
Butter a medium-sized baking dish with 4 tablespoons of butter and dust with puff pastry flour
Alternate layers of sweet potato and zucchini, sprinkling with Parmesan and Emmental cheese (reserve some for the top). Reserve
Prepare the bechamel sauce
In a large saucepan, melt the butter over low heat
Add the flour, whisking constantly until it comes to a boil and starts to brown
Remove from heat and slowly add the milk, whisking continuously
Season with salt, nutmeg, and black pepper
Return the saucepan to the heat and cook for a few more minutes until the sauce thickens
Pour the bechamel sauce over the vegetables in the baking dish and sprinkle with the reserved cheese
Bake at moderate temperature (180°C) for 40 minutes or until the top is golden brown and serve.