Prep jars: Sterilize clean jars and lids (dishwasher hot cycle or 200°F/95°C oven for about 10 minutes). Let dry completely.
Combine: In a large bowl, mix raisins, golden raisins, currants, cranberries, chopped apricots, diced apples, diced pear, and candied peel. Stir in optional chopped almonds.
Season and sweeten: Add suet, melted butter, brown sugar, honey, cinnamon, nutmeg, allspice, ginger, cloves, orange zest and juice, and lemon zest and juice. Mix until everything looks evenly coated and glossy.
Cook gently: Transfer the mixture to a slow cooker. Cook on LOW for 3–4 hours, stirring occasionally, until the fruit softens slightly and the mixture is thick and jammy. (Stovetop option: simmer very gently in a heavy pot 45–60 minutes, stirring often.)
Cool and add brandy: Let the mincemeat cool until just warm. Stir in the brandy (or rum) so the alcohol doesn’t evaporate too quickly.
Jar: Spoon into sterilized jars, pressing down to remove air pockets and leaving about 1/2 inch headspace. Seal tightly.
Mature: Store jars in a cool, dark place for at least 2 weeks for best flavor. Flip the jars every few days (or give a gentle shake weekly) to keep fruit evenly moistened.