Cook the pasta in boiling water for 10-15 minutes, until just cooked.

Preheat oven to 180C (350F).

Grease an oven proof dish.

Place the milk, butter, plain flour, black pepper and a good pinch of nutmeg into the metal Magimix Cook Expert bowl and run EXPERT program for 9 minutes/speed 4/95C.

When the program has finished add the cheddar, gruyere and HALF the parmesan to the bowl and run EXPERT program for 1 minute/speed 2A.

Remove bowl from base and stir in truffle oil to taste. Add the cooked pasta and mix through.

Pour into prepared dish, combine the breadcrumbs with the remaining grated parmesan and sprinkle evenly over the top.

Bake for 20-25 minutes, until the top is golden brown and crisp.