Preheat oven to 180C (350F)
Cook pasta according to the package instructions
In the Thermomix, chop onion and garlic with the measuring cup (MC) on for 3 seconds | Speed 5
Scrape down sides of the bowl, add oil and sauté with the MC off for 3 minutes | Varoma | Speed 1
Put sausages in the Varoma tray and put the lid on
Add diced tomatoes, tomato paste, Worcestershire sauce, herbs, stock and 200g of water into the Thermomix bowl, close the lid and put the Varoma on top
Cook sauce and sausages for 20 minutes | Varoma | Speed 2
Remove the Varoma and leave sausages to cool slightly
Taste the sauce, season with salt and pepper as required and then purée for 20 seconds – slowly going from Speed 1 to Speed 7
Cut sausages into 1.5cm pieces and add to the sauce
Add butterfly to the Thermomix bowl and add drained pasta
Mix for 20 seconds | Reverse | Speed 1
Pour pasta and sauce into a square roasting dish and sprinkle with cheese
Bake in the oven for about 30-35 minutes, until the cheese is melted and slightly browned