Start by cooking the onions until they are soft and the oil has separated in the pot.
Next, incorporate cream into the gravy and mix well.
Use a stick blender to blend the mixture until it reaches a smooth consistency.
Add a generous amount of water, approximately two large jugs, and blend again to achieve your desired thickness.
Bring the gravy to a boil, then turn off the heat.
Your base gravy is now ready to be used.
