Ingredients
1 1/2 pounds red plums, halved, pitted, and coarsely chopped
1 1/2 cups sugar
3 (2 1/2 inches) lemon zest, plus 1 tablespoon fresh lemon juice
Pinch of salt
1/2 vanilla bean, seeds scraped and reserved
Preparation
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.
