Preheat oven to Gas Mark 5.
Place 4 tablespoons of Vegetable Oil in your Casserole Baking Dish and then heat the Vegetable Oil on the hob stove if Casserole Dish is suitable and then turn the hob heat down too a low simmer and then peel 3 onions and then slice them down the middle - water wash and then place in the warm Vegetable Oil - stir with a Wooden Spoon occasionally over a Period of 15 minutes and then add 1000ml/ 1 Litre of cold water and then add 16 tsp. Onion Gravy Granules

Boil on a high hob heat for a further 15 minutes and then place the heavy metal Casserole Lid over the top and then cook in the oven for 1 hour and 30 minutes

Use 750g of peeled King Edward Potatoes and use the Slicer Attachment of your Electric Mains Food Processor and then allow the thin slices of potatoes to rest in cold water within a large mixing bowl and then eventually distribute all the damp slices of potatoes too the top of your onions in Gravy and then bake at Gas Mark 6 in the oven with the Casserole Lid on - for One hour and then cook with the Lid off - for a further One hour