Use a mortar and pestle and lightly pound the ginger to release the juices. You could also grate the ginger using a fine grater/zester instead. Keep aside.
In a pot, bring water to a boil. Once water starts to boil, reduce the heat and add the ginger and tea leaves. Let it simmer for 5-7 minutes.
Add sugar to sweeten. I like my tea moderately sweet so 2 teaspoons does the trick for me but you can adjust the sugar as per your taste. Stir to combine and turn off the heat. At this stage, you can serve it straight as a black tea or add milk. It tastes wonderful either way!
Strain and serve it piping hot along with some biscuits of your choice.
Notes
Do not steep the tea leaves for too long as this will make it bitter tasting.