"This bright, citrus-flavored shrub--a sweet-tart infusion of vinegar and fruit--from Mary Karlin, author of Mastering Fermentation, keeps for months in the fridge. You'll need a widemouth 1-qt. canning jar and a piece of cheesecloth...."
INGREDIENTS
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3 lg Red Grapefruit
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1-1/3 C Raw( Unpasteurized) Coconut Vinegar- such as Coconut Secret