Blackberry Jam

Directions

1. 1
   Combine blackberries and sugar in a pot over medium heat.
2. 2
   Bring to a simmer.
3. 3
   Strain seeds if desired, then return juice to pot, reserving 1 tbsp of juice in a small bowl.
4. 4
   Add the cornstarch to the reserved juice (make sure the juice has cooled down first).
5. 5
   Blend completely.
6. 6
   Add cornstarch mixture to juice; bring to a boil.
7. 7
   Stir frequently, until jam is thickened, about 15 minutes.
8. 8
   Remove from heat and stir in lemon juice.