Heat large non-stick fry pan over high heat. Place mushrooms, onion and garlic in a food processor. Process to form a thick paste. Add mushroom mixture to the hot pan, squeeze sausage meat out of the casings and cook for 6 minutes.
Add tomato paste to mixture and cook for a further 4 minutes. Reduce heat, add tomato passata and simmer for a further 2 minutes.
Meanwhile bring a large pot of water to the boil and cook pasta to packet instructions. Strain and set aside.
Add pasta to sauce and serve with basil leaves and shavings of Parmesan.
Servings 4