Pour port into saucepan and place on high heat.
Heat port until boiling then add cloves, cinnamon, vanilla, star anise and ginger.
Peel pears leaving stalks in tact then core from the base of each pear using a corer or sharp pairing knife.
Rinse pears, shake off excess water and then lower into port sauce.
Pears should be placed on their sides, and the port sauce should just cover the pears.
Lower heat to a simmer and poach, turning every 10 mins, until pears are soft (30-40 mins).
Once pears are cooked, remove them from the port sauce and allow them to cool.
Raise the heat to medium and reduce port sauce by 1/3.
Once sauce has reduced remove from heat, strain and allow to cool.