Gluhwein

For each person, you need:
You also need some cloves and cinnamon sticks. Add about 6 cloves and
one cinnamon stick for each litre of the mixture. (Use more or less
depending on taste – another friend prefers a stronger clove taste.)

Put the sugar, lemon slices and spices in a pot and heat gently until the
sugar is melted. (It may be necessary to poke at the lemon with a fork
to release the juice.)

Add wine and heat gently, stirring, until drinking temperature is
reached. Leave it for a while for a stronger spice/lemon flavour.

If you are concerned about the alcohol, you can boil it gently for a
while which will remove the alcohol.

A slightly different flavour can be obtained by including some vanilla
beans.