Wash the beets thoroughly, trim the tops and roots, and cook them until tender using boiling or steaming.
Allow the cooked beets to cool enough to handle, then peel away the skins and slice them into even rounds.
Divide cinnamon, cloves, and peppercorns between clean jars before adding the beet slices.
Combine vinegar, water, sugar, and salt in a saucepan and heat until the sugar dissolves completely.
Pour the warm brine over the beet slices, ensuring they are fully submerged beneath the liquid.
Let the jars cool at room temperature before sealing them and placing them into the refrigerator.
Chill for at least one day before serving, allowing the beets to develop their signature sweet and tangy flavor.