Simple Blueberry Jam

(Real Simple July 2011) Simple Blueberry Jam
5 cups blueberries
½ cup sugar
1 Tb fresh lemon juice
¼ tsp kosher salt
In a med saucepan, combine blueberries, sugar, lemon juice and salt. Mash with a potato masher or wooden spoon until berries have released their juices.
Cook over med-high heat, stirring occasionally, until mixture has thickened, 18 – 25 minutes. Transfer to containers and refrigerate for up to 1 month or freeze for up to 1 year.
This recipe can also be made with two 10 oz bags of frozen blueberries instead of fresh. Cook the frozen berries for 2 – 3 minutes before mashing, then reduce the total cooking time to 15 – 17 minutes.