Pour vinegar into non-aluminum 2-quart saucepan. Heat until very hot, stirring occasionally. Do Not boil. (If vinegar boils, it will become cloudy.)
Pour into glass bowl; add basil. Cover with plastic wrap. Let stand in cool place about 1 week until desired amount of flavour develops. Strain before using. Store up to 6 months in jar or bottle with tight- fitting lid.
or tarragon for the basil. Or, substitute cider vinegar for the wine vinegar.