Wash the mint leaves thoroughly and pat them dry with a towel.
Remove the leaves from the stems and discard the stems.
Finely chop the leaves to release their flavor.
Boil the Water
Bring ⅓ cup of water to a boil.
Combine the Mint & Water
Place the chopped mint in a small heatproof bowl or container. Pour the boiling water over the mint. Stir gently to coat all the leaves.
Sweeten & Cool
Add 1 tablespoon of sugar to the hot water and mint. Let the mixture sit for about 15 minutes, or until the liquid has cooled enough to be comfortable to touch. This step allows the mint to infuse and the sugar to dissolve completely.
Add Vinegar & Salt
Stir in ⅓ cup of cider vinegar and ¼ teaspoon sea salt. Taste and adjust seasoning if needed. The sauce should be bright, tangy, and balanced.
Serve or Store
Transfer the mint sauce to a serving bowl, or refrigerate in an airtight container for up to 1–2 days. Stir before serving if it has sat for a while.
Notes
That's it. Serve immediately or reserve for later use.