Firstly, start cooking your pasta in a pan of boiling water.
Meanwhile, fry the onion and parsnip in frylight on low heat until browned, then add all the other ingredients and simmer on lowest heat for 5 minutes. Note you may need to top the water up a little.
Once the pasta has cooked, drain and stir in to the pasta sauce you’ve created and serve with a wedge of lemon.