Heat the oil and butler in a large flying pan.
Add the onion and brown sugar and cook, stirring
frequently, over a medium heat until the onion
is golden brown and softened.
Add the flour and
cook for a further 2 minutes. Remove
from the heat and gradually stir in the beef
consommé and water.
Return to the heat,
stirring constantly, until the soup boils and
simmer until it thickens. Serve hot.