Blueberry Jam

Directions

1. 1
   Put the blueberries in a large nonmetallic bowl with half the sugar, the lemon juice, and the salt.
2. 2
   Stir to mix, then cover and let stand at room temperature, without stirring, for 5 hours.
3. 3
   Meanwhile, put a small plate in the refrigerator to chill.
4. 4
   Pour the contents of the bowl into a large stainless-steel pan over a low heat.
5. 5
   Add the remaining sugar and stir until the sugar completely dissolves.
6. 6
   Increase the heat and bring the mixture rapidly to a boil, without stirring, then boil for 1012 minutes, or until it reaches the setting point.
7. 7
   Remove the pan from the heat and test for a set.
8. 8
   With the pan still off the heat, use a large metal spoon to skim the surface.
9. 9
   Let the jam cool slightly, then pour it into the prepared jars to within 1/8 in (3mm) of the tops and seal.
10. 10
    Let the jam cool, then label and date the jars.
11. 11
    Store in a cool, dark place until ready to use, then refrigerate after opening.