Make the Shrub Base
In a nonreactive bowl, combine chopped peaches, grated ginger, and sugar.
Stir well, cover, and refrigerate for 24 hours—stirring once or twice—until syrup forms.
Strain through a fine-mesh strainer into a clean jar, pressing solids to extract juice.
Discard or repurpose solids. Stir in apple cider vinegar until fully combined.
Rest and Store
Seal jar and refrigerate for 2–3 days to allow flavors to meld.
Serve
Mix 1–2 tablespoon shrub into sparkling water or iced tea over ice.