Place the parmesan cheese into your Thermomix bowl and mix for 10 seconds, Speed 9 to grate. Transfer to a bowl and set aside until needed.
Without washing the bowl, add the garlic cloves and onion and mix for 5 seconds, Speed 7.
Scrape down the sides of the Thermomix bowl and add the bacon pieces and butter. Cook for 5 minutes, 100 degrees, Speed 2 - measuring cup off.
Scrape down the sides of the Thermomix bowl and add the cream and pinch of salt and pepper. Cook for 20 minutes, 110 degrees, REVERSE, Speed 2 - also with the measuring cup off. Please use a splatter guard (TM6) or basket insert (TM5/TM31) on top of your bowl to prevent any splatters.
Add 60 grams of parmesan cheese and stir through the sauce. Transfer to a Thermoserver to keep warm.
In a clean mixing bowl, add 1200 grams of water and the salt. Cook for 10 minutes, Varoma temperature, Speed 2 - measuring cup on.
Carefully remove the measuring cup and add the pasta through the hole in the lid. Cook for 9 minutes, Varoma temperature, REVERSE, Speed 2, or until the pasta has just cooked.
Drain the water from the pasta and add the pasta to your ThermoServer and use a pair of tongs to mix through with the sauce. Serve with the remaining parmesan cheese sprinkled over the top.