1. Rinse the leaves and pat them dry. Put them in a large jar that has a lid.
2. Pour in the red wine and vodka. Add the sugar and peppercorns, cover, and shake well to dissolve the sugar. Let stand one week, shaking the jar a few times once per day. The leaves will wilt into the wine after a day or so, so not to worry if they aren’t all marinating in the wine at first.
3. When ready, strain the liquid into a bottle using a funnel and a mesh strainer (or cheesecloth). Discard the leaves. Chill the cherry leaf wine until ready to drink.