Place the strawberries, sugar, and lime zest in a sterilized jar, muddle the strawberries with the sugar. Loosely place a lid on the jar. Let it sit on your kitchen counter for two days.
Add the apple cider vinegar to the jar and stir to combine. Strain into another jar using a fine mesh strainer. Store the covered jar in the fridge.
Notes
A typical serving is 3 tablespoons. Needs to age for a couple of days on the counter.