Remove the skin from the sausage and chop into chunks.
Fry the onion in olive oil until it starts to soften
Add the sausage meat and continue cooking until it starts to brown.
Add the white wine and cook for a further few minutes.
Add salt and pepper to taste.
Put water on to boil for the pasta. Add salt once it starts to boil.
Add the passata or chopped tomatoes and simmer the sauce for 20-25 minutes ( If it gets too dry you can pour in a little water or more wine)
Cook the pasta al dente according to the instructions on the packet.
When the pasta is cooked and strained add it to the sauce and cook everything together for a further minute, stirring the sauce into the pasta.
Serve with grated parmesan.