Ingredients

　　1 1/2 pounds red plums, halved, pitted, and coarsely chopped

　　1 1/2 cups sugar

　　3 strips (2 1/2 inches) lemon zest, plus 1 tablespoon fresh lemon juice

　　Pinch of salt

　　1/2 vanilla bean, seeds scraped and reserved

　　Bring all ingredients to a boil in a large stockpot, mashing with a potato masher. Cook, stirring frequently, until mixture is the consistency of very thick honey, 5 to 10 minutes. Remove plum skin if desired. Discard vanilla bean and zest. Do not strain; jam should be chunky. Refrigerate in an airtight container up to 1 month.

　　Reprinted with permission from The Martha Stewart Living Cookbook: The New Classics by Martha Stewart Living Magazine, copyright © 2007. Published by Clarkson Potter, a division of The Crown Publishing Group.Buy the full book from Amazon.