Do the gravy first! Trust me it can take a while to get the onions just right!
Fry the onions, very slowly in a little oil, covered for about 20 mins until soft.
Remove the lid and turn up the heat until the onions are golden, do this for as long as necessary.
Pour in the vinegar and boil until it almost disappears.
Turn the heat down and add the spread, stock and 1 pint of water. Stir well.
Simmer until you have a gravy consistency. This could take a while.
Now make the sausages
Put the walnuts, bread and onion into a food processor and pulse to break down. I had to do this in batches as my machine wasn't big or powerful enough.
Add the paprika and garlic and season.
Form the mixture into 8 - 10 sausages. Making them smaller keeps them together better when cooking.
Now cook the mash as normal at the appropriate time.
Serve with green veg of your choice.