Wash the apples thoroughly, remove the cores, and slice them into thin wedges or rounds depending on your preferred serving style.
Toss the apple slices gently with lemon juice to help prevent browning while preparing the pickling liquid.
Place cinnamon stick, cloves, peppercorns, and salt into clean glass jars before adding the prepared apple slices.
Combine apple cider vinegar, water, and sugar in a saucepan, then warm gently until the sugar dissolves completely.
Pour the warm spiced brine over the apples, making sure the fruit pieces are fully covered by the liquid.
Allow the jars to cool slightly before sealing them and transferring them into the refrigerator.
Let the apples rest overnight before serving, allowing the cinnamon and vinegar flavors to blend while keeping the fruit crisp.