First, cook the pasta according to the package directions. Since it will keep cooking in the oven later, you'll want it slightly firm—so knock about 2 minutes off the suggested cook time.
Preheat your oven to 180°C (350°F) and get ready to make that cozy cheese sauce!
Making the Cheese Sauce:
100 g Cheddar cheese, 100 g Emmental cheese, 50 g Parmesan cheese
Cut the cheese into rough chunks and place in the mixing bowl. Grate for 8 sec / speed 10. Transfer to a bowl and quickly rinse the mixing bowl.
30 g Butter
Add the butter to the mixing bowl and melt for 2 min / 60°C (140°F) / speed 2.
20 g All-purpose flour
Add the flour to create your roux and cook for 3 min / 100°C (210°F) / speed 1.
200 ml Milk, 100 ml Heavy cream
Set the timer to 6 min / 90°C (190°F) / speed 3 and slowly pour the milk and heavy cream through the opening in the lid. Pop the lid attachment back on.
100 g Cheddar cheese, 100 g Emmental cheese, 50 g Parmesan cheese, 1/2 tsp Prepared mustard, 1 pinch Ground nutmeg, Salt and black pepper
When the time is up, add the grated cheese, mustard, nutmeg, salt, and pepper, then stir for 2 min / 100°C (210°F) / speed 1 until velvety smooth.
Assembly & Baking:
200 g Elbow macaroni
Pour the cheesy sauce all over the macaroni and toss until every noodle is nicely coated.
Transfer the mixture into a baking dish and smooth the top into an even layer.
50 g Panko or breadcrumbs, 30 g Butter
Melt the butter in the microwave or in your rinsed Thermomix® (2 min / 60°C (140°F) / speed 2) and toss together with the panko breadcrumbs.
200 g Elbow macaroni
Scatter the buttery crumb mixture evenly over the pasta and bake on the upper-middle rack for 25-30 minutes until golden and bubbly.