Rinse the currants, remove the stalks, dry them. Put raspberries, star anise, currants, caraway seeds, mint, kumquats cut in half lengthwise (with peel) and rock candy in a bottle and fill with grain. Leave the liqueur to infuse in a cool place for 6 weeks, then pour through a coffee filter and fill into a carafe.
You can use the fruit to garnish desserts.