After a few grape picks one realizes that there are only so many things to do with a bounty of grapes. I've made a store of grape jam and these lovely green grapes were to perfect to squish and boil so pickling it was. Pickling creates an entirely new phenomena - sweet and delicately flavored.
500 ml jar full of stemmed grapes
1 cup white wine vinegar
1 cup sugar
1 1/2 t mustard seeds
1 t peppercorns
1 cinnamon stick
1/4 t salt
Bring vinegar, sugar and spices to a boil. Let cool. Pour over grapes. Refrigerate for a few days before tasting.