Soak the sour cherries in the brandy (for a couple of hours if you can, but minimum 30 minutes).
Peel then shred the pears with a coarse cheese grater into a heavy based pan. Add the lemon juice and toss well.
Add the sugar, sultanas, soaked sour cherries and brandy, then all spices.
Gently bring to the boil, put on a lid, turn down the heat and simmer for 15-20 minutes.
Stir in the walnuts and crystallised ginger, then cook for a couple of minutes, or until you get a thick, sticky mixture.
Cool in the pan, then pour in the brandy and transfer the mincemeat to sterilized jars. Store the mincemeat in a cool, dark place. Once opened, keep it in the fridge.