1) Cut a lemon in quarters and stick about 6 or 7 cloves in the flesh.
2) Put the lemon at the bottom of a glass with a teaspoon of brown sugar.
3) Pour boiling water over the lemon quarters, stirring roughly to disturb the flavours (think Caipirinha)
4) Add a dash of whiskey as desired.
Steps 1-3 are entirely optional.