Boil 400 grams (14 oz) of pasta as mentioned on the package.
Grate 400 grams (14 oz) of cheese (100 gr of each: Cheddar, Gouda, Emmentaler and Parmesan).
In a thick-bottomed stewpan, melt 60 grams(4 tbsp) of butter at medium heat. Slowly add 30 grams(2 tbsp) of flour and stir well with a whisk.
Then gently pour the 800 ml (3 ½ cup) of milk, stirring constantly until the flour will dissolve completely.
Lower the temperature, and add a pinch of salt, pepper, ground garlic and a little grated nutmeg. Mix well and then incorporate 350 grams (12 oz) of cheese, until it is melted.
At the moment the pasta is boiled, drain it and then pour it in a casserole. Add the sauce over the pasta and mix gently not to break the pasta. Then garnish the casserole with the remaining cheese.
Put it in the preheated oven at 180°C (370°F) for about 15 minutes.
Serve immediatly.