Blackberry Filling

1. 1

   Stir together blackberries and sugar; let stand 1 hour.

2. 2

   Process blackberry mixture in a blender or food processor until smooth. Pour through a fine wire-mesh strainer into a bowl; press with back of a spoon to squeeze out juice, discarding solids.

3. 3

   Cook juice mixture and remaining ingredients in a Dutch oven over medium-low heat 12 minutes or until thick and bubbly. Cool. Cover and chill 8 hours.

No additional tips available.