Recipe: Homemade Champagne Vinegar

I was searching for champagne vinegar when I stumble across Martha Stewart's website which contained what to do with leftover champagne - make vinegar. Martha states:

Instead of discarding leftover champagne, use it to make vinegar:
Pour the champagne into widemouthed jars, and leave the jars open; after a few weeks, the resulting vinegar can be used to make vinaigrette. Champagne vinegar can be stored, covered, for up to six months.

Have fun.