Ultimate Bangers and Mash
Gravy time. Slice your red onions and add them to a frying pan along with a glug of olive oil. Once the onions are soft, crush in the stock cube and add your flour. Mix them into the onions.
Pour in your red wine vinegar along with 100ml of boiling water. Stirring continuously until you have a nice smooth gravy, and then chop half of your parsley and add it to the gravy.
Once your potatoes have boiled and are soft, drain the water from the pan and put them back into it. Add in your butter, milk and a tsp of mustard, along with a sprinkling of salt and pepper. Mash this all together until it is nice and smooth.