Wash the oranges and the lemon thoroughly and rub down the skins with the sugar cubes. Put the orange sugar into a bowl and then add the juice of your 5 oranges and 1 lemon. Stir well, cover and leave to rest for an hour.
Pour boiling water over the tea leaves, leave for a couple of minutes and then strain. Mix the tea with the orange juice mix, the rum and then heat the mix again. Don't let it boil as this will ruin the flavour.
Pour the tea into a teapot and serve. Often served with Christmas cookies.