How to Make RED ONION GRAVY for Toad in the Hole, Sausage and Mash or Yorkshire Pudding

Rich, brown, red onion gravy. An easy step by step recipe video. Delicious with sausages and mash or Toad in the Hole. See my recipe for Traditional Toad in the hole here: Ingredients: 1 Tbsp Vegetable Oil 1 Large Red Onion (Peeled and sliced into half moons) 2 tsp Balsamic Vinegar 1 tsp Light soft brown sugar 2 heaped tsp Cornflour 500ml Vegetable Stock