Combine water and ginger in a pot and bring to a boil

Boil ginger mixture for 5 minutes

Strain ginger mixture and bring the solution back to a boil.

Add sugar and alum

Slice a lemon. Using a spoon, add the juice and pulp of the lemon directly to the mixture.

Reduce temperature and continue to simmer for 10-15 minutes

Turn off heat and allow the mixture to cool

Strain mixture and then put into jars