Put all the above ingredients in a pot and bring to a boil.
Allow this to simmer of low heat for about 5 – 8 minutes. You can bash the ginger around in the pot a bit to bring out more of its flavour.
Allow to cool and strain the liquid into a small jug to serve.
Add a splash (desired quantity) of the cooled cordial to a glass and top up with soda water (club soda) or sparkling mineral water. Add tequila if you are in a party mood. Serve with fresh lime and pomegranate seeds.